/// <summary>
/// Checks match expression syntax. Throws exception if syntax isn't valid.
/// </summary>
/// <param name="matchExpression">Match expression string.</param>
public static void CheckMatchExpressionSyntax(string matchExpression)
{
GlobalMessageRuleProcessor p = new GlobalMessageRuleProcessor();
p.Match(true, new LumiSoft.Net.StringReader(matchExpression), null, null, null, null, 0);
}
/// <summary>
/// Checks match expression syntax. Throws exception if syntax isn't valid.
/// </summary>
/// <param name="matchExpression">Match expression string.</param>
public static void CheckMatchExpressionSyntax(string matchExpression)
{
GlobalMessageRuleProcessor p = new GlobalMessageRuleProcessor();
p.Match(true,new LumiSoft.Net.StringReader(matchExpression),null,null,null,null,0);
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="recipient"></param>
/// <param name="userName"></param>
/// <param name="storeFolder">Message folder where message will be stored. For example 'Inbox'.</param>
/// <param name="msgStream"></param>
/// <param name="e">Event data.</param>
internal void ProcessUserMsg(string sender,string recipient,string userName,string storeFolder,Stream msgStream,MessageStoringCompleted_eArgs e)
{
string userID = m_pApi.GetUserID(userName);
// This value can be null only if user deleted during this session, so just skip next actions.
if(userID == null){
return;
}
#region User Message rules
Stream filteredMsgStream = msgStream;
filteredMsgStream.Position = 0;
Mime mime = null;
try{
mime = Mime.Parse(filteredMsgStream);
}
// Invalid message syntax, block such message.
catch{
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Invalid message structure/syntax, message blocked !";
return;
}
string[] to = new string[]{recipient};
//--- Check User Message Rules --------------------------------------------------------------//
bool deleteMessage = false;
string smtpErrorText = null;
// Loop rules
foreach(DataRowView drV_Rule in m_pApi.GetUserMessageRules(userName)){
// Reset stream position
filteredMsgStream.Position = 0;
if(Convert.ToBoolean(drV_Rule["Enabled"])){
string ruleID = drV_Rule["RuleID"].ToString();
GlobalMessageRule_CheckNextRule_enum checkNextIf = (GlobalMessageRule_CheckNextRule_enum)(int)drV_Rule["CheckNextRuleIf"];
string matchExpression = drV_Rule["MatchExpression"].ToString();
// e may be null if server internal method call and no actual session !
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
GlobalMessageRuleProcessor ruleEngine = new GlobalMessageRuleProcessor();
bool matches = ruleEngine.Match(matchExpression,sender,to,session,mime,(int)filteredMsgStream.Length);
if(matches){
// Do actions
GlobalMessageRuleActionResult result = ruleEngine.DoActions(
m_pApi.GetUserMessageRuleActions(userID,ruleID),
this,
filteredMsgStream,
sender,
to
);
if(result.DeleteMessage){
deleteMessage = true;
}
if(result.StoreFolder != null){
storeFolder = result.StoreFolder;
}
if(result.ErrorText != null){
smtpErrorText = result.ErrorText;
}
}
//--- See if we must check next rule -------------------------------------------------//
if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.Always){
// Do nothing
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfMatches && !matches){
break;
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfNotMatches && matches){
break;
}
//------------------------------------------------------------------------------------//
}
}
// Return error to connected client
if(smtpErrorText != null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = smtpErrorText;
return;
}
// Just don't store message
if(deleteMessage){
return;
}
// Reset stream position
filteredMsgStream.Position = 0;
//--- End of Global Rules -------------------------------------------------------------------//
#endregion
// ToDo: User message filtering
#region User message filtering
//--- Filter message -----------------------------------------------//
/* MemoryStream filteredMsgStream = msgStream;
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type=ISmtpUserMessageFilter";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
string assemblyFile = drViewFilter.Row["Assembly"].ToString();
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = m_SartUpPath + "\\Filters\\" + assemblyFile;
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpMessageFilter filter = (ISmtpMessageFilter)filterInstance;
FilterResult result = filter.Filter(filteredMsgStream,out filteredMsgStream,sender,recipient,m_pApi);
switch(result)
{
case FilterResult.DontStore:
return; // Just skip messge, act as message is stored
case FilterResult.Error:
// ToDO: Add implementaion here or get rid of it (use exception instead ???).
return;
}
}*/
//---------------------------------------------------------------//
#endregion
try{
m_pApi.StoreMessage("system",userName,storeFolder,filteredMsgStream,DateTime.Now,IMAP_MessageFlags.Recent);
}
catch{
// Storing probably failed because there isn't such folder, just store to user inbox.
m_pApi.StoreMessage("system",userName,"Inbox",filteredMsgStream,DateTime.Now,IMAP_MessageFlags.Recent);
}
}
/// <summary>
/// Processes and stores message.
/// </summary>
/// <param name="sender">Mail from.</param>
/// <param name="recipient">Recipient to.</param>
/// <param name="msgStream">Message stream. Stream position must be there where message begins.</param>
/// <param name="e">Event data.</param>
public void ProcessAndStoreMessage(string sender,string[] recipient,Stream msgStream,MessageStoringCompleted_eArgs e)
{
#region Global Filtering stuff
//--- Filter message -----------------------------------------------//
Stream filteredMsgStream = msgStream;
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type='ISmtpMessageFilter'";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
try{
filteredMsgStream.Position = 0;
string assemblyFile = API_Utlis.PathFix(drViewFilter.Row["Assembly"].ToString());
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = API_Utlis.PathFix(m_pOwnerServer.StartupPath + "\\Filters\\" + assemblyFile);
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpMessageFilter filter = (ISmtpMessageFilter)filterInstance;
string errorText = "";
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
FilterResult result = filter.Filter(filteredMsgStream,out filteredMsgStream,sender,recipient,m_pApi,session,out errorText);
if(result == FilterResult.DontStore){
// Just skip messge, act as message is stored
e.ServerReply.ReplyText = "Message just discarded by filter !";
return;
}
else if(result == FilterResult.Error){
if(e != null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = errorText;
}
else{
// NOTE: 26.01.2006 - e maybe null if that method is called server internally and no smtp session.
}
return;
}
// Filter didn't return message stream
if(filteredMsgStream == null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Message rejected by filter";
return;
}
}
catch(Exception x){
// Filtering failed, log error and allow message through.
OnError(x);
}
}
//---------------------------------------------------------------//
#endregion
#region Global Message Rules
filteredMsgStream.Position = 0;
Mime mime = null;
try{
mime = Mime.Parse(filteredMsgStream);
}
// Invalid message syntax, block such message.
catch{
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = "Invalid message structure/syntax, message blocked !";
return;
}
string[] to = recipient;
//--- Check Global Message Rules --------------------------------------------------------------//
bool deleteMessage = false;
string storeFolder = "Inbox";
string smtpErrorText = null;
// Loop rules
foreach(DataRowView drV_Rule in m_pApi.GetGlobalMessageRules()){
// Reset stream position
filteredMsgStream.Position = 0;
if(Convert.ToBoolean(drV_Rule["Enabled"])){
string ruleID = drV_Rule["RuleID"].ToString();
GlobalMessageRule_CheckNextRule_enum checkNextIf = (GlobalMessageRule_CheckNextRule_enum)(int)drV_Rule["CheckNextRuleIf"];
string matchExpression = drV_Rule["MatchExpression"].ToString();
// e may be null if server internal method call and no actual session !
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
GlobalMessageRuleProcessor ruleEngine = new GlobalMessageRuleProcessor();
bool matches = ruleEngine.Match(matchExpression,sender,to,session,mime,(int)filteredMsgStream.Length);
if(matches){
// Do actions
GlobalMessageRuleActionResult result = ruleEngine.DoActions(
m_pApi.GetGlobalMessageRuleActions(ruleID),
this,
filteredMsgStream,
sender,
to
);
if(result.DeleteMessage){
deleteMessage = true;
}
if(result.StoreFolder != null){
storeFolder = result.StoreFolder;
}
if(result.ErrorText != null){
smtpErrorText = result.ErrorText;
}
}
//--- See if we must check next rule -------------------------------------------------//
if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.Always){
// Do nothing
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfMatches && !matches){
break;
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfNotMatches && matches){
break;
}
//------------------------------------------------------------------------------------//
}
}
// Return error to connected client
if(smtpErrorText != null){
e.ServerReply.ErrorReply = true;
e.ServerReply.ReplyText = smtpErrorText;
return;
}
// Just don't store message
if(deleteMessage){
return;
}
// Reset stream position
filteredMsgStream.Position = 0;
//--- End of Global Rules -------------------------------------------------------------------//
#endregion
#region Construct final recipients
// Construct final recipients, replace mailing list members with actual addresses.
List<string> finalRecipients = new List<string>();
foreach(string r in recipient){
string emailAddress = r;
// If domain isn't specified, add default domain
if(emailAddress.IndexOf("@") == -1){
emailAddress += "@" + m_SMTP_DefaultDomain;
}
// This is mailing list address, get member email addresses
if(m_pApi.MailingListExists(emailAddress)){
List<string> processedMailignLists = new List<string>();
Queue<string> processQueue = new Queue<string>();
processQueue.Enqueue(emailAddress);
// Loop while there are mailing lists or nested mailing list available
while(processQueue.Count > 0){
string mailingList = processQueue.Dequeue();
processedMailignLists.Add(mailingList);
// Process mailing list members
foreach(DataRowView drV in m_pApi.GetMailingListAddresses(mailingList)){
string member = drV["Address"].ToString();
// Member is asteric pattern matching server emails
if(member.IndexOf('*') > -1){
DataView dvServerAddresses = m_pApi.GetUserAddresses("");
foreach(DataRowView drvServerAddress in dvServerAddresses){
string serverAddress = drvServerAddress["Address"].ToString();
if(SCore.IsAstericMatch(member,serverAddress)){
if(!finalRecipients.Contains(serverAddress)){
finalRecipients.Add(serverAddress);
}
}
}
}
// Member is user or group, not email address
else if(member.IndexOf('@') == -1){
// Member is group, replace with actual users
if(m_pApi.GroupExists(member)){
foreach(string user in m_pApi.GetGroupUsers(member)){
if(!finalRecipients.Contains(user)){
finalRecipients.Add(user);
}
}
}
// Member is user
else if(m_pApi.UserExists(member)){
if(!finalRecipients.Contains(member)){
finalRecipients.Add(member);
}
}
// Unknown member, do nothing
else{
}
}
// Member is nested mailing list
else if(m_pApi.MailingListExists(member)){
// Don't proccess poroccessed mailing lists any more, causes infinite loop
if(!processedMailignLists.Contains(member)){
processQueue.Enqueue(member);
}
}
// Member is normal email address
else{
if(!finalRecipients.Contains(member)){
finalRecipients.Add(member);
}
}
}
}
}
// Normal email address
else{
if(!finalRecipients.Contains(emailAddress)){
finalRecipients.Add(emailAddress);
}
}
}
// TODO: ???
// Map routing
// Map local server email address to user.
#endregion
// Store individual message to each recipient
foreach(string r in finalRecipients){
ProcessRecipientMsg(sender,r,storeFolder,filteredMsgStream,e);
}
}
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="recipient"></param>
/// <param name="userName"></param>
/// <param name="storeFolder">Message folder where message will be stored. For example 'Inbox'.</param>
/// <param name="msgStream"></param>
/// <param name="e">Event data.</param>
internal void ProcessUserMsg(string sender,string recipient,string userName,string storeFolder,Stream msgStream,SMTP_e_MessageStored e)
{
string userID = m_pApi.GetUserID(userName);
// This value can be null only if user deleted during this session, so just skip next actions.
if(userID == null){
return;
}
#region User Message rules
Stream filteredMsgStream = msgStream;
filteredMsgStream.Position = 0;
Mail_Message mime = null;
try{
mime = Mail_Message.ParseFromStream(filteredMsgStream);
}
// Invalid message syntax, block such message.
catch{
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: Message has invalid structure/syntax.");
return;
}
string[] to = new string[]{recipient};
//--- Check User Message Rules --------------------------------------------------------------//
bool deleteMessage = false;
string smtpErrorText = null;
// Loop rules
foreach(DataRowView drV_Rule in m_pApi.GetUserMessageRules(userName)){
// Reset stream position
filteredMsgStream.Position = 0;
if(Convert.ToBoolean(drV_Rule["Enabled"])){
string ruleID = drV_Rule["RuleID"].ToString();
GlobalMessageRule_CheckNextRule_enum checkNextIf = (GlobalMessageRule_CheckNextRule_enum)(int)drV_Rule["CheckNextRuleIf"];
string matchExpression = drV_Rule["MatchExpression"].ToString();
// e may be null if server internal method call and no actual session !
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
GlobalMessageRuleProcessor ruleEngine = new GlobalMessageRuleProcessor();
bool matches = ruleEngine.Match(matchExpression,sender,to,session,mime,(int)filteredMsgStream.Length);
if(matches){
// Do actions
GlobalMessageRuleActionResult result = ruleEngine.DoActions(
m_pApi.GetUserMessageRuleActions(userID,ruleID),
this,
filteredMsgStream,
sender,
to
);
if(result.DeleteMessage){
deleteMessage = true;
}
if(result.StoreFolder != null){
storeFolder = result.StoreFolder;
}
if(result.ErrorText != null){
smtpErrorText = result.ErrorText;
}
}
//--- See if we must check next rule -------------------------------------------------//
if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.Always){
// Do nothing
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfMatches && !matches){
break;
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfNotMatches && matches){
break;
}
//------------------------------------------------------------------------------------//
}
}
// Return error to connected client
if(smtpErrorText != null){
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: " + smtpErrorText);
return;
}
// Just don't store message
if(deleteMessage){
return;
}
// Reset stream position
filteredMsgStream.Position = 0;
//--- End of Global Rules -------------------------------------------------------------------//
#endregion
// ToDo: User message filtering
#region User message filtering
//--- Filter message -----------------------------------------------//
/* MemoryStream filteredMsgStream = msgStream;
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type=ISmtpUserMessageFilter";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
string assemblyFile = drViewFilter.Row["Assembly"].ToString();
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = m_SartUpPath + "\\Filters\\" + assemblyFile;
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpMessageFilter filter = (ISmtpMessageFilter)filterInstance;
FilterResult result = filter.Filter(filteredMsgStream,out filteredMsgStream,sender,recipient,m_pApi);
switch(result)
{
case FilterResult.DontStore:
return; // Just skip messge, act as message is stored
case FilterResult.Error:
// ToDO: Add implementaion here or get rid of it (use exception instead ???).
return;
}
}*/
//---------------------------------------------------------------//
#endregion
filteredMsgStream.Position = 0;
/* RFC 2821 4.4.
When the delivery SMTP server makes the "final delivery" of a message, it inserts
a return-path line at the beginning of the mail data. This use of return-path is
required; mail systems MUST support it. The return-path line preserves the information
in the <reverse-path> from the MAIL command.
*/
MultiStream finalStoreStream = new MultiStream();
// e can be null if method caller isn't SMTP session.
if(e != null){
finalStoreStream.AppendStream(new MemoryStream(Encoding.Default.GetBytes("Return-Path: <" + e.Session.From.Mailbox + ">\r\n")));
}
finalStoreStream.AppendStream(filteredMsgStream);
try{
m_pApi.StoreMessage("system",userName,storeFolder,finalStoreStream,DateTime.Now,new string[]{"Recent"});
}
catch{
// Storing probably failed because there isn't such folder, just store to user inbox.
m_pApi.StoreMessage("system",userName,"Inbox",finalStoreStream,DateTime.Now,new string[]{"Recent"});
}
}
/// <summary>
/// Processes and stores message.
/// </summary>
/// <param name="envelopeID">Envelope ID_(MAIL FROM: ENVID).</param>
/// <param name="sender">Mail from.</param>
/// <param name="ret">Specifies what parts of message are returned in DSN report.</param>
/// <param name="recipients">Message recipients.</param>
/// <param name="msgStream">Message stream. Stream position must be there where message begins.</param>
/// <param name="e">Event data.</param>
/// <exception cref="ArgumentNullException">Is raised when <b>recipients</b> or <b>msgStream</b> is nulll reference.</exception>
public void ProcessAndStoreMessage(string envelopeID,string sender,SMTP_DSN_Ret ret,SMTP_RcptTo[] recipients,Stream msgStream,SMTP_e_MessageStored e)
{
if(recipients == null){
throw new ArgumentNullException("recipients");
}
if(msgStream == null){
throw new ArgumentNullException("msgStream");
}
/* Message processing.
*) Message filters.
*) Global message rules.
*) Process recipients.
*/
List<SMTP_RcptTo> dsn_Delivered = new List<SMTP_RcptTo>();
string[] to = new string[recipients.Length];
for(int i=0;i<to.Length;i++){
to[i] = recipients[i].Mailbox;
}
#region Global Filtering stuff
//--- Filter message -----------------------------------------------//
Stream filteredMsgStream = msgStream;
DataView dvFilters = m_pApi.GetFilters();
dvFilters.RowFilter = "Enabled=true AND Type='ISmtpMessageFilter'";
dvFilters.Sort = "Cost";
foreach(DataRowView drViewFilter in dvFilters){
try{
filteredMsgStream.Position = 0;
string assemblyFile = API_Utlis.PathFix(drViewFilter.Row["Assembly"].ToString());
// File is without path probably, try to load it from filters folder
if(!File.Exists(assemblyFile)){
assemblyFile = API_Utlis.PathFix(m_pOwnerServer.StartupPath + "\\Filters\\" + assemblyFile);
}
Assembly ass = Assembly.LoadFrom(assemblyFile);
Type tp = ass.GetType(drViewFilter.Row["ClassName"].ToString());
object filterInstance = Activator.CreateInstance(tp);
ISmtpMessageFilter filter = (ISmtpMessageFilter)filterInstance;
string errorText = "";
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
FilterResult result = filter.Filter(filteredMsgStream,out filteredMsgStream,sender,to,m_pApi,session,out errorText);
if(result == FilterResult.DontStore){
// Just skip messge, act as message is stored
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: Message discarded by server filter.");
return;
}
else if(result == FilterResult.Error){
if(e != null){
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: " + errorText);
}
else{
// NOTE: 26.01.2006 - e maybe null if that method is called server internally and no smtp session.
}
return;
}
// Filter didn't return message stream
if(filteredMsgStream == null){
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: Message discarded by server filter.");
return;
}
}
catch(Exception x){
// Filtering failed, log error and allow message through.
OnError(x);
}
}
//---------------------------------------------------------------//
#endregion
#region Global Message Rules
filteredMsgStream.Position = 0;
Mail_Message mime = null;
try{
mime = Mail_Message.ParseFromStream(filteredMsgStream);
}
// Invalid message syntax, block such message.
catch{
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: Message has invalid structure/syntax.");
try{
if(!Directory.Exists(this.MailStorePath + "Unparseable")){
Directory.CreateDirectory(this.MailStorePath + "Unparseable");
}
using(FileStream fs = File.Create(this.MailStorePath + "Unparseable\\" + Guid.NewGuid().ToString().Replace("-","") + ".eml")){
filteredMsgStream.Position = 0;
Net_Utils.StreamCopy(filteredMsgStream,fs,32000);
}
}
catch{
}
return;
}
//--- Check Global Message Rules --------------------------------------------------------------//
bool deleteMessage = false;
string storeFolder = "Inbox";
string smtpErrorText = null;
// Loop rules
foreach(DataRowView drV_Rule in m_pApi.GetGlobalMessageRules()){
// Reset stream position
filteredMsgStream.Position = 0;
if(Convert.ToBoolean(drV_Rule["Enabled"])){
string ruleID = drV_Rule["RuleID"].ToString();
GlobalMessageRule_CheckNextRule_enum checkNextIf = (GlobalMessageRule_CheckNextRule_enum)(int)drV_Rule["CheckNextRuleIf"];
string matchExpression = drV_Rule["MatchExpression"].ToString();
// e may be null if server internal method call and no actual session !
SMTP_Session session = null;
if(e != null){
session = e.Session;
}
GlobalMessageRuleProcessor ruleEngine = new GlobalMessageRuleProcessor();
bool matches = ruleEngine.Match(matchExpression,sender,to,session,mime,(int)filteredMsgStream.Length);
if(matches){
// Do actions
GlobalMessageRuleActionResult result = ruleEngine.DoActions(
m_pApi.GetGlobalMessageRuleActions(ruleID),
this,
filteredMsgStream,
sender,
to
);
if(result.DeleteMessage){
deleteMessage = true;
}
if(result.StoreFolder != null){
storeFolder = result.StoreFolder;
}
if(result.ErrorText != null){
smtpErrorText = result.ErrorText;
}
}
//--- See if we must check next rule -------------------------------------------------//
if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.Always){
// Do nothing
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfMatches && !matches){
break;
}
else if(checkNextIf == GlobalMessageRule_CheckNextRule_enum.IfNotMatches && matches){
break;
}
//------------------------------------------------------------------------------------//
}
}
// Return error to connected client
if(smtpErrorText != null){
e.Reply = new SMTP_Reply(552,"Requested mail action aborted: " + smtpErrorText);
return;
}
// Just don't store message
if(deleteMessage){
return;
}
// Reset stream position
filteredMsgStream.Position = 0;
//--- End of Global Rules -------------------------------------------------------------------//
#endregion
#region Process recipients
HashSet<string> processedItems = new HashSet<string>();
Queue<SMTP_RcptTo> recipientsQueue = new Queue<SMTP_RcptTo>();
// Queue current recipients for processing.
foreach(SMTP_RcptTo recipient in recipients){
recipientsQueue.Enqueue(recipient);
}
while(recipientsQueue.Count > 0){
/* Process order
*) Local user
*) Local address
*) Local mailing list address
*) Route
*) Relay
*/
SMTP_RcptTo recipient = recipientsQueue.Dequeue();
// Check if we already have processed this item. Skip dublicate items.
// This method also avoids loops when 2 recipients reference each other.
if(processedItems.Contains(recipient.Mailbox)){
continue;
}
processedItems.Add(recipient.Mailbox);
#region Local user
if(recipient.Mailbox.IndexOf('@') == -1 && m_pApi.UserExists(recipient.Mailbox)){
// Add user to processed list.
processedItems.Add(recipient.Mailbox);
// Delivery status notification(DSN) requested to this user.
if((recipient.Notify & SMTP_DSN_Notify.Success) != 0){
dsn_Delivered.Add(recipient);
}
ProcessUserMsg(sender,recipient.Mailbox,recipient.Mailbox,storeFolder,filteredMsgStream,e);
continue;
}
#endregion
#region Local address
string localUser = m_pApi.MapUser(recipient.Mailbox);
if(localUser != null){
// Add user to processed list.
processedItems.Add(localUser);
// Delivery status notification(DSN) requested to this user.
if((recipient.Notify & SMTP_DSN_Notify.Success) != 0){
dsn_Delivered.Add(recipient);
}
ProcessUserMsg(sender,recipient.Mailbox,localUser,storeFolder,filteredMsgStream,e);
}
#endregion
#region Mailing list address
else if(m_pApi.MailingListExists(recipient.Mailbox)){
// Delivery status notification(DSN) requested to this user.
if((recipient.Notify & SMTP_DSN_Notify.Success) != 0){
dsn_Delivered.Add(recipient);
}
Queue<string> processQueue = new Queue<string>();
processQueue.Enqueue(recipient.Mailbox);
// Loop while there are mailing lists or nested mailing list available
while(processQueue.Count > 0){
string mailingList = processQueue.Dequeue();
// Process mailing list members
foreach(DataRowView drV in m_pApi.GetMailingListAddresses(mailingList)){
string member = drV["Address"].ToString();
// Member is asteric pattern matching server emails
if(member.IndexOf('*') > -1){
DataView dvServerAddresses = m_pApi.GetUserAddresses("");
foreach(DataRowView drvServerAddress in dvServerAddresses){
string serverAddress = drvServerAddress["Address"].ToString();
if(SCore.IsAstericMatch(member,serverAddress)){
recipientsQueue.Enqueue(new SMTP_RcptTo(serverAddress,SMTP_DSN_Notify.NotSpecified,null));
}
}
}
// Member is user or group, not email address
else if(member.IndexOf('@') == -1){
// Member is group, replace with actual users
if(m_pApi.GroupExists(member)){
foreach(string user in m_pApi.GetGroupUsers(member)){
recipientsQueue.Enqueue(new SMTP_RcptTo(user,SMTP_DSN_Notify.NotSpecified,null));
}
}
// Member is user
else if(m_pApi.UserExists(member)){
recipientsQueue.Enqueue(new SMTP_RcptTo(member,SMTP_DSN_Notify.NotSpecified,null));
}
// Unknown member, skip it.
else{
}
}
// Member is nested mailing list
else if(m_pApi.MailingListExists(member)){
processQueue.Enqueue(member);
}
// Member is normal email address
else{
recipientsQueue.Enqueue(new SMTP_RcptTo(member,SMTP_DSN_Notify.NotSpecified,null));
}
}
}
}
#endregion
else{
bool isRouted = false;
#region Check Routing
foreach(DataRowView drRoute in m_pApi.GetRoutes()){
// We have matching route
if(Convert.ToBoolean(drRoute["Enabled"]) && SCore.IsAstericMatch(drRoute["Pattern"].ToString(),recipient.Mailbox)){
string description = drRoute["Action"].ToString();
RouteAction_enum action = (RouteAction_enum)Convert.ToInt32(drRoute["Action"]);
byte[] actionData = (byte[])drRoute["ActionData"];
#region RouteToEmail
if(action == RouteAction_enum.RouteToEmail){
XmlTable table = new XmlTable("ActionData");
table.Parse(actionData);
// Add email to process queue.
recipientsQueue.Enqueue(new SMTP_RcptTo(table.GetValue("EmailAddress"),SMTP_DSN_Notify.NotSpecified,null));
// Log
if(e != null){
e.Session.LogAddText("Route '[" + description + "]: " + drRoute["Pattern"].ToString() + "' routed to email '" + table.GetValue("EmailAddress") + "'.");
}
}
#endregion
#region RouteToHost
else if(action == RouteAction_enum.RouteToHost){
XmlTable table = new XmlTable("ActionData");
table.Parse(actionData);
msgStream.Position = 0;
// Route didn't match, so we have relay message.
this.RelayServer.StoreRelayMessage(
Guid.NewGuid().ToString(),
envelopeID,
msgStream,
HostEndPoint.Parse(table.GetValue("Host") + ":" + table.GetValue("Port")),
sender,
recipient.Mailbox,
recipient.ORCPT,
recipient.Notify,
ret
);
// Log
if(e != null){
e.Session.LogAddText("Route '[" + description + "]: " + drRoute["Pattern"].ToString() + "' routed to host '" + table.GetValue("Host") + ":" + table.GetValue("Port") + "'.");
}
}
#endregion
#region RouteToMailbox
else if(action == RouteAction_enum.RouteToMailbox){
XmlTable table = new XmlTable("ActionData");
table.Parse(actionData);
ProcessUserMsg(sender,recipient.Mailbox,table.GetValue("Mailbox"),storeFolder,filteredMsgStream,e);
// Log
if(e != null){
e.Session.LogAddText("Route '[" + description + "]: " + drRoute["Pattern"].ToString() + "' routed to user '" + table.GetValue("Mailbox") + "'.");
}
}
#endregion
isRouted = true;
break;
}
}
#endregion
// Route didn't match, so we have relay message.
if(!isRouted){
filteredMsgStream.Position = 0;
this.RelayServer.StoreRelayMessage(
Guid.NewGuid().ToString(),
envelopeID,
filteredMsgStream,
null,
sender,
recipient.Mailbox,
recipient.ORCPT,
recipient.Notify,
ret
);
}
}
}
#endregion
#region DSN "delivered"
// Send DSN for requested recipients.
if(dsn_Delivered.Count > 0 && !string.IsNullOrEmpty(sender)){
try{
string dsn_to = "";
for(int i=0;i<dsn_Delivered.Count;i++){
if(i == (dsn_Delivered.Count - 1)){
dsn_to += dsn_Delivered[i].Mailbox;
}
else{
dsn_to += dsn_Delivered[i].Mailbox + "; ";
}
}
string reportingMTA = "";
if(e != null && !string.IsNullOrEmpty(e.Session.LocalHostName)){
reportingMTA = e.Session.LocalHostName;
}
else{
reportingMTA = System.Net.Dns.GetHostName();
}
ServerReturnMessage messageTemplate = null;
if(messageTemplate == null){
string bodyRtf = "" +
"{\\rtf1\\ansi\\ansicpg1257\\deff0\\deflang1061{\\fonttbl{\\f0\\froman\\fcharset0 Times New Roman;}{\\f1\froman\\fcharset186{\\*\\fname Times New Roman;}Times New Roman Baltic;}{\\f2\fswiss\\fcharset186{\\*\\fname Arial;}Arial Baltic;}}\r\n" +
"{\\colortbl ;\\red0\\green128\\blue0;\\red128\\green128\\blue128;}\r\n" +
"{\\*\\generator Msftedit 5.41.21.2508;}\\viewkind4\\uc1\\pard\\sb100\\sa100\\lang1033\\f0\\fs24\\par\r\n" +
"Your message WAS SUCCESSFULLY DELIVERED to:\\line\\lang1061\\f1\\tab\\cf1\\lang1033\\b\\f0 " + dsn_to + "\\line\\cf0\\b0 and you explicitly requested a delivery status notification on success.\\par\\par\r\n" +
"\\cf2 Your original message\\lang1061\\f1 /header\\lang1033\\f0 is attached to this e-mail\\lang1061\\f1 .\\lang1033\\f0\\par\\r\\n" +
"\\cf0\\line\\par\r\n" +
"\\pard\\lang1061\\f2\\fs20\\par\r\n" +
"}\r\n";
messageTemplate = new ServerReturnMessage("DSN SUCCESSFULLY DELIVERED: " + mime.Subject,bodyRtf);
}
string rtf = messageTemplate.BodyTextRtf;
Mail_Message dsnMsg = new Mail_Message();
dsnMsg.MimeVersion = "1.0";
dsnMsg.Date = DateTime.Now;
dsnMsg.From = new Mail_t_MailboxList();
dsnMsg.From.Add(new Mail_t_Mailbox("Mail Delivery Subsystem","postmaster@local"));
dsnMsg.To = new Mail_t_AddressList();
dsnMsg.To.Add(new Mail_t_Mailbox(null,sender));
dsnMsg.Subject = messageTemplate.Subject;
//--- multipart/report -------------------------------------------------------------------------------------------------
MIME_h_ContentType contentType_multipartReport = new MIME_h_ContentType(MIME_MediaTypes.Multipart.report);
contentType_multipartReport.Parameters["report-type"] = "delivery-status";
contentType_multipartReport.Param_Boundary = Guid.NewGuid().ToString().Replace('-','.');
MIME_b_MultipartReport multipartReport = new MIME_b_MultipartReport(contentType_multipartReport);
dsnMsg.Body = multipartReport;
//--- multipart/alternative -----------------------------------------------------------------------------------------
MIME_Entity entity_multipart_alternative = new MIME_Entity();
MIME_h_ContentType contentType_multipartAlternative = new MIME_h_ContentType(MIME_MediaTypes.Multipart.alternative);
contentType_multipartAlternative.Param_Boundary = Guid.NewGuid().ToString().Replace('-','.');
MIME_b_MultipartAlternative multipartAlternative = new MIME_b_MultipartAlternative(contentType_multipartAlternative);
entity_multipart_alternative.Body = multipartAlternative;
multipartReport.BodyParts.Add(entity_multipart_alternative);
//--- text/plain ---------------------------------------------------------------------------------------------------
MIME_Entity entity_text_plain = new MIME_Entity();
MIME_b_Text text_plain = new MIME_b_Text(MIME_MediaTypes.Text.plain);
entity_text_plain.Body = text_plain;
text_plain.SetText(MIME_TransferEncodings.QuotedPrintable,Encoding.UTF8,SCore.RtfToText(rtf));
multipartAlternative.BodyParts.Add(entity_text_plain);
//--- text/html -----------------------------------------------------------------------------------------------------
MIME_Entity entity_text_html = new MIME_Entity();
MIME_b_Text text_html = new MIME_b_Text(MIME_MediaTypes.Text.html);
entity_text_html.Body = text_html;
text_html.SetText(MIME_TransferEncodings.QuotedPrintable,Encoding.UTF8,SCore.RtfToHtml(rtf));
multipartAlternative.BodyParts.Add(entity_text_html);
//--- message/delivery-status
MIME_Entity entity_message_deliveryStatus = new MIME_Entity();
MIME_b_MessageDeliveryStatus body_message_deliveryStatus = new MIME_b_MessageDeliveryStatus();
entity_message_deliveryStatus.Body = body_message_deliveryStatus;
multipartReport.BodyParts.Add(entity_message_deliveryStatus);
//--- per-message-fields ----------------------------------------------------------------------------
MIME_h_Collection messageFields = body_message_deliveryStatus.MessageFields;
if(!string.IsNullOrEmpty(envelopeID)){
messageFields.Add(new MIME_h_Unstructured("Original-Envelope-Id",envelopeID));
}
messageFields.Add(new MIME_h_Unstructured("Arrival-Date",MIME_Utils.DateTimeToRfc2822(DateTime.Now)));
if(e != null && !string.IsNullOrEmpty(e.Session.EhloHost)){
messageFields.Add(new MIME_h_Unstructured("Received-From-MTA","dns;" + e.Session.EhloHost));
}
messageFields.Add(new MIME_h_Unstructured("Reporting-MTA","dns;" + reportingMTA));
//---------------------------------------------------------------------------------------------------
foreach(SMTP_RcptTo r in dsn_Delivered){
//--- per-recipient-fields --------------------------------------------------------------------------
MIME_h_Collection recipientFields = new MIME_h_Collection(new MIME_h_Provider());
if(r.ORCPT != null){
recipientFields.Add(new MIME_h_Unstructured("Original-Recipient",r.ORCPT));
}
recipientFields.Add(new MIME_h_Unstructured("Final-Recipient","rfc822;" + r.Mailbox));
recipientFields.Add(new MIME_h_Unstructured("Action","delivered"));
recipientFields.Add(new MIME_h_Unstructured("Status","2.0.0"));
body_message_deliveryStatus.RecipientBlocks.Add(recipientFields);
//---------------------------------------------------------------------------------------------------
}
//--- message/rfc822
if(mime != null){
MIME_Entity entity_message_rfc822 = new MIME_Entity();
MIME_b_MessageRfc822 body_message_rfc822 = new MIME_b_MessageRfc822();
entity_message_rfc822.Body = body_message_rfc822;
if(ret == SMTP_DSN_Ret.FullMessage){
body_message_rfc822.Message = mime;
}
else{
MemoryStream ms = new MemoryStream();
mime.Header.ToStream(ms,null,null);
ms.Position = 0;
body_message_rfc822.Message = Mail_Message.ParseFromStream(ms);
}
multipartReport.BodyParts.Add(entity_message_rfc822);
}
using(MemoryStream strm = new MemoryStream()){
dsnMsg.ToStream(strm,new MIME_Encoding_EncodedWord(MIME_EncodedWordEncoding.Q,Encoding.UTF8),Encoding.UTF8);
ProcessAndStoreMessage("",new string[]{sender},strm,null);
}
}
catch(Exception x){
Error.DumpError(this.Name,x);
}
}
#endregion
}