/// <summary>
/// To simplify inbound mail sending, SMTP Server allows you to drop new messages into a pickup folder
/// You don't need to use SmtpClient or some other SMTP client
/// </summary>
public void SendFailure(OutgoingMessage envelope, string pickupFolder, DirectAddressCollection recipients)
{
if (string.IsNullOrEmpty(pickupFolder))
{
throw new ArgumentException("value null or empty", "pickupFolder");
}
if (recipients.IsNullOrEmpty())
{
return;
}
if (recipients != null && envelope.UsingDeliveryStatus)
{
DSNMessage notification = this.ProduceFailure(envelope, recipients);
string filePath = Path.Combine(pickupFolder, Extensions.CreateUniqueFileName());
notification.Save(filePath);
}
//Or maybe
//
// m_router.Route(message, envelope, routedRecipients);
//
// This would avoid loopback encrypt/decrypt...
//
// ISmtpMessage message
// MessageEnvelope envelope
// DirectAddressCollection routedRecipients, but would use DSN in-reply-to:
//
}
public void TestIncomingBasic()
{
Message message = LoadMessage("simple.eml");
DirectAddressCollection rcpto = new DirectAddressCollection(
new DirectAddress[] {
new DirectAddress("*****@*****.**"),
new DirectAddress("*****@*****.**")
}
);
IncomingMessage incoming = new IncomingMessage(message, rcpto, new DirectAddress("*****@*****.**"));
Assert.True(incoming.Recipients.Count == 2);
DirectAddressCollection routingRecipients = incoming.GetRecipientsInRoutingHeaders();
Assert.True(routingRecipients.Count == 1);
Assert.False(incoming.AreAddressesInRoutingHeaders(rcpto));
incoming.Recipients.Remove(x => MimeStandard.Equals(x.Address, "*****@*****.**"));
Assert.True(incoming.AreAddressesInRoutingHeaders(rcpto));
message.ToValue = "*****@*****.**";
incoming = new IncomingMessage(message, rcpto, new DirectAddress("*****@*****.**"));
Assert.False(incoming.AreAddressesInRoutingHeaders(rcpto));
message.ToValue = "*****@*****.**";
incoming = new IncomingMessage(message, rcpto, new DirectAddress("*****@*****.**"));
Assert.False(incoming.AreAddressesInRoutingHeaders(rcpto));
}
public void RemoveRecipients()
{
MessageEnvelope envelope = new MessageEnvelope(TestMessage);
DirectAddressCollection toRemove = new DirectAddressCollection();
toRemove.Add(new DirectAddress("<*****@*****.**>"));
toRemove.Add(new DirectAddress("<*****@*****.**>"));
toRemove.Add(new DirectAddress("<*****@*****.**>"));
toRemove.Add(new DirectAddress("<*****@*****.**>"));
Assert.DoesNotThrow(() => envelope.RemoveFromRoutingHeaders(toRemove));
string outputText = null;
Assert.DoesNotThrow(() => outputText = envelope.SerializeMessage());
Message outputMessage = Message.Load(outputText);
Assert.True(outputMessage.Bcc == null);
this.CheckHeaderRaw(outputMessage.Cc, 2);
this.CheckCollection(outputMessage.Cc,
new string[] {"*****@*****.**", "*****@*****.**"},
new string[] {"*****@*****.**>", "*****@*****.**"});
this.CheckHeaderRaw(outputMessage.To, 1);
this.CheckCollection(outputMessage.To,
new string[] { "*****@*****.**"},
new string[] { "*****@*****.**"});
}
public void TestBasicAdddressCollectionCreate()
{
DirectAddressCollection coll = new DirectAddressCollection();
Assert.False(coll.IsTrusted());
Assert.Equal<string>("", coll.ToString());
Assert.False(coll.IsTrusted(TrustEnforcementStatus.Failed));
Assert.True(coll.GetCertificates().Count == 0);
Assert.True(coll.Certificates.Count() == 0);
Assert.True(coll.GetUntrusted().Count() == 0);
Assert.True(coll.GetTrusted().Count() == 0);
Assert.DoesNotThrow(() => coll.RemoveUntrusted());
}
/// <summary>
/// Ensure that domain recipients are KNOWN - i.e. registered with the Config System
/// If not, remove them.
/// </summary>
/// <param name="message"></param>
void VerifyDomainRecipientsRegistered(IncomingMessage message)
{
message.EnsureRecipientsCategorizedByDomain(this.SecurityAgent.Domains);
if (!message.HasDomainRecipients)
{
throw new AgentException(AgentError.NoRecipients);
}
DirectAddressCollection recipients = message.DomainRecipients;
if (this.Settings.MaxIncomingDomainRecipients > 0 && recipients.Count > this.Settings.MaxIncomingDomainRecipients)
{
throw new AgentException(AgentError.MaxDomainRecipients);
}
if (!m_settings.HasAddressManager)
{
// Address validation is turned off
return;
}
Address[] resolved = m_configService.GetAddresses(recipients);
if (resolved.IsNullOrEmpty())
{
throw new AgentException(AgentError.NoDomainRecipients);
}
// Remove any addresses that could not be resolved
// Yes, this is currently n^2, but given the typical # of addresses, cost should be insignificant
int i = 0;
while (i < recipients.Count)
{
DirectAddress recipient = recipients[i];
int iAddress = Array.FindIndex <Address>(resolved, x => x.Match(recipient));
if (iAddress >= 0)
{
++i; // Found
recipient.Tag = resolved[iAddress];
}
else
{
recipients.RemoveAt(i);
}
}
}
DirectAddressCollection BasicCollection()
{
string[] addrStrings = new string[]
{
"*****@*****.**",
"\"Franklin Roosevelt\" <*****@*****.**>",
"sean+o'*****@*****.**"
};
IEnumerable <DirectAddress> addrs = addrStrings.Select(a => new DirectAddress(a));
DirectAddressCollection coll = new DirectAddressCollection();
coll.Add(addrs);
coll[0].Status = TrustEnforcementStatus.Failed;
coll[1].Status = TrustEnforcementStatus.Unknown;
coll[2].Status = TrustEnforcementStatus.Success;
return(coll);
}
internal Address[] GetAddresses(DirectAddressCollection addresses)
{
Debug.Assert(m_settings.HasAddressManager);
string[] emailAddresses = (
from address in addresses
select address.Address
).ToArray();
using (AddressManagerClient client = CreateAddressManagerClient())
{
if (AddressDomainSearchEnabled(m_settings.AddressManager))
{
return client.GetAddressesOrDomain(emailAddresses, EntityStatus.Enabled);
}
return client.GetAddresses(emailAddresses, EntityStatus.Enabled);
}
}
/// <summary>
/// To simplify outbound mail sending, SMTP Server allows you to drop new messages into a pickup folder
/// You don't need to use SmtpClient or some other SMTP client
/// </summary>
public void Send(IncomingMessage envelope, string pickupFolder, DirectAddressCollection senders, MDNStandard.NotificationType notificationType)
{
if (string.IsNullOrEmpty(pickupFolder))
{
throw new ArgumentException("value null or empty", "pickupFolder");
}
if (senders.IsNullOrEmpty())
{
return;
}
foreach (NotificationMessage notification in this.Produce(envelope, senders.AsMailAddresses(), notificationType))
{
string filePath = Path.Combine(pickupFolder, Extensions.CreateUniqueFileName());
notification.Save(filePath);
}
}
internal Address[] GetAddresses(DirectAddressCollection addresses)
{
Debug.Assert(m_settings.HasAddressManager);
string[] emailAddresses = (
from address in addresses
select address.Address
).ToArray();
using (AddressManagerClient client = CreateAddressManagerClient())
{
if (AddressDomainSearchEnabled(m_settings.AddressManager))
{
return(client.GetAddressesOrDomain(emailAddresses, EntityStatus.Enabled));
}
return(client.GetAddresses(emailAddresses, EntityStatus.Enabled));
}
}
/// <summary>
/// To simplify outbound mail sending, SMTP Server allows you to drop new messages into a pickup folder
/// You don't need to use SmtpClient or some other SMTP client
/// </summary>
public void Send(IncomingMessage envelope, string pickupFolder, DirectAddressCollection senders, MDNStandard.NotificationType notificationType)
{
if (string.IsNullOrEmpty(pickupFolder))
{
throw new ArgumentException("value null or empty", "pickupFolder");
}
if (senders.IsNullOrEmpty())
{
return;
}
foreach (NotificationMessage notification in this.Produce(envelope, senders.AsMailAddresses(), notificationType))
{
string filePath = Path.Combine(pickupFolder, Extensions.CreateUniqueFileName());
notification.Save(filePath);
}
}
MessageEnvelope CreateEnvelope(CDO.Message message)
{
DirectAddressCollection recipientAddresses = null;
DirectAddress senderAddress = null;
MessageEnvelope envelope;
string messageText = message.GetMessageText();
if (this.ExtractEnvelopeFields(message, ref recipientAddresses, ref senderAddress))
{
envelope = new MessageEnvelope(messageText, recipientAddresses, senderAddress);
}
else
{
envelope = new MessageEnvelope(messageText);
}
return(envelope);
}
string CollectNoCertInformation(DirectAddressCollection recipients)
{
if (recipients.IsNullOrEmpty())
{
return(string.Empty);
}
StringBuilder builder = new StringBuilder();
foreach (DirectAddress recipient in recipients)
{
if (!recipient.HasCertificates)
{
builder.Append(recipient.Address).Append(';');
}
}
return(builder.ToString());
}
protected static void MockPublicCerts(DirectAddressCollection recipients, Mock <ICertificateResolver> mockDnsResolver)
{
foreach (var recipient in recipients)
{
string address = recipient.Address;
string host = new MailAddress(address).Host;
mockDnsResolver.Setup(
reslover => reslover.GetCertificates(It.Is <MailAddress>(adrs =>
adrs.Address.Equals(
new MailAddress(address).Address
, StringComparison.OrdinalIgnoreCase))))
.Returns(TestCertificates.AllPublicCerts.Where((x) =>
{
return
(x.MatchEmailNameOrName(address) ||
x.MatchDnsName(host));
}
));
}
}
public void TestUntrusted()
{
//
// This should be accepted because the envelope is what we look at
//
MessageEnvelope envelope = new MessageEnvelope(BadMessage,
DirectAddressCollection.ParseSmtpServerEnvelope("*****@*****.**"),
new DirectAddress("*****@*****.**")
);
Assert.DoesNotThrow(() => m_agent.SecurityAgent.ProcessOutgoing(envelope));
envelope = new MessageEnvelope(string.Format(TestMessage, Guid.NewGuid()),
DirectAddressCollection.ParseSmtpServerEnvelope("*****@*****.**"),
new DirectAddress("*****@*****.**"));
//
// This SHOULD throw an exception
//
Assert.Throws <OutgoingAgentException>(() => m_agent.SecurityAgent.ProcessOutgoing(envelope));
}
void CheckCollection(Header header, string[] contains, string[] doesNotContain)
{
Assert.True(header != null);
DirectAddressCollection collection = null;
Assert.DoesNotThrow(() => collection = DirectAddressCollection.Parse(header.Value));
if (!contains.IsNullOrEmpty())
{
foreach (string addr in contains)
{
Assert.True(collection.Contains(addr));
}
}
if (!doesNotContain.IsNullOrEmpty())
{
foreach (string addr in doesNotContain)
{
Assert.True(!collection.Contains(addr));
}
}
}
//
// A CDO Message could be arriving via the SMTP server, or could have been constructed manually
// The one created by SMTP has envelope information
// Returns false if no envelope info is available. We have to look within message headers in that case
//
bool ExtractEnvelopeFields(CDO.Message message, ref DirectAddressCollection recipientAddresses, ref DirectAddress senderAddress)
{
if (!this.HasEnvelope)
{
//
// No envelope
//
return(false);
}
recipientAddresses = null;
senderAddress = null;
string sender = message.GetEnvelopeSender();
if (string.IsNullOrEmpty(sender))
{
throw new SmtpAgentException(SmtpAgentError.NoSenderInEnvelope);
}
//
// In SMTP Server, the MAIL TO (sender) in the envelope can be empty if the message is from the server postmaster
// The actual postmaster address is found in the message itself
//
if (Health.Direct.SmtpAgent.Extensions.IsSenderLocalPostmaster(sender))
{
return(false);
}
string recipients = message.GetEnvelopeRecipients();
if (string.IsNullOrEmpty(recipients))
{
throw new SmtpAgentException(SmtpAgentError.NoRecipientsInEnvelope);
}
recipientAddresses = DirectAddressCollection.ParseSmtpServerEnvelope(recipients);
senderAddress = new DirectAddress(sender);
return(true);
}
void Route(ISmtpMessage message, DirectAddressCollection recipients, DirectAddressCollection routedRecipients)
{
Dictionary <string, Route> matchedRoutes = new Dictionary <string, Route>(StringComparer.OrdinalIgnoreCase);
int i = 0;
//
// First, find all routes that match
// We'll remove recipients that were routed from the recipients list so
// SMTP server does not itself try to deliver to them
//
while (i < recipients.Count)
{
DirectAddress recipient = recipients[i];
Address address = recipient.Tag as Address;
if (address != null)
{
Route route = this[address.Type];
if (route != null)
{
matchedRoutes[address.Type] = route;
recipients.RemoveAt(i);
if (routedRecipients != null)
{
recipient.Tag = route.AddressType; // Reference for failed delivery
routedRecipients.Add(recipient); // Add the routed recipient to the list
}
continue;
}
}
++i;
}
if (matchedRoutes.Count == 0)
{
return;
}
this.Route(message, matchedRoutes.Values);
}
/// <summary>
/// To simplify inbound mail sending, SMTP Server allows you to drop new messages into a pickup folder
/// You don't need to use SmtpClient or some other SMTP client
/// </summary>
public void SendFailure(OutgoingMessage envelope, string pickupFolder)
{
if (string.IsNullOrEmpty(pickupFolder))
{
throw new ArgumentException("value null or empty", "pickupFolder");
}
DirectAddressCollection recipients = envelope.RejectedRecipients;
if (recipients.IsNullOrEmpty())
{
return;
}
if (recipients != null && envelope.UsingDeliveryStatus)
{
DSNMessage notification = this.ProduceFailure(envelope, recipients);
string filePath = Path.Combine(pickupFolder, Extensions.CreateUniqueFileName());
notification.Save(filePath);
}
}
/// <summary>
/// Decrypts and verifies trust in a signed and encrypted RFC 5322 formatted message, providing a sender and recipient addresses.
/// The provided sender and recipient addresses will be used instead of the header information in the <c>messageText</c>.
/// </summary>
/// <param name="messageText">
/// An RFC 5322 formatted message string.
/// </param>
/// <param name="recipients">
/// A <see cref="DirectAddressCollection"/> instance representing recipient addresses.
/// </param>
/// <param name="sender">
/// An <see cref="DirectAddress"/> instance representing the sender address
/// </param>
/// <returns>
/// An <see cref="IncomingMessage"/> instance with the trust verified decrypted and verified message.
/// </returns>
public IncomingMessage ProcessIncoming(string messageText, DirectAddressCollection recipients, DirectAddress sender)
{
IncomingMessage message = new IncomingMessage(messageText, recipients, sender);
return this.ProcessIncoming(message);
}
/// <summary>
/// Creates an instance from a <see cref="Message"/> and explicitly assigned sender and receivers, which take precendence over what may be
/// in the message headers.
/// </summary>
/// <param name="message">The <see cref="Message"/> this envelopes</param>
/// <param name="recipients">The <see cref="DirectAddressCollection"/> of reciepients; takes precedence over the <c>To:</c> header</param>
/// <param name="sender">The <see cref="DirectAddress"/> of the sender - typically the MAIL FROM in SMTP; takes precendence over the <c>From:</c> header.</param>
public MessageEnvelope(Message message, DirectAddressCollection recipients, DirectAddress sender)
{
this.Message = message;
this.Recipients = recipients;
this.Sender = sender;
this.NotifyTo = GetDispostionNotifyTo(message);
}
internal virtual void CategorizeRecipientsByTrust(TrustEnforcementStatus minTrustStatus)
{
m_rejectedRecipients = DirectAddressCollection.Create(Recipients.GetUntrusted(minTrustStatus));
if (this.HasRecipients)
{
this.Recipients.RemoveUntrusted(minTrustStatus);
}
if (this.HasDomainRecipients)
{
this.DomainRecipients.RemoveUntrusted(minTrustStatus);
}
}
public void SetRcptTo(DirectAddressCollection recipients)
{
if (recipients == null)
{
throw new ArgumentNullException("recipients");
}
if (this.HasEnvelope)
{
m_message.SetEnvelopeRecipients(recipients.ToMailAddressCollection());
}
}
void SendDeliveryStatus(IEnumerable<Route> router, IncomingMessage envelope, DirectAddressCollection routedRecipients)
{
if (envelope.Message.IsMDN() || envelope.Message.IsDSN())
{
return;
}
DirectAddressCollection undeliveredRecipients = new DirectAddressCollection();
foreach (var route in router)
{
if (route.FailedDelivery)
{
foreach (var routedRecipient in routedRecipients)
{
if(route.AddressType == routedRecipient.Tag as string)
{
undeliveredRecipients.Add(routedRecipient);
}
}
}
}
try
{
m_notifications.SendFailure(envelope, m_settings.InternalMessage.PickupFolder, undeliveredRecipients);
}
catch (Exception ex)
{
Logger.Error("While sending un-secured DSN {0}", ex.Message);
}
}
public void TestParseAddressCollection(string addressList, int expectedCount)
{
DirectAddressCollection coll = DirectAddressCollection.Parse(addressList);
Assert.Equal <int>(expectedCount, coll.Count);
}
/// <summary>
/// Generate external notification messages for failed final destination delivery
/// </summary>
/// <param name="envelope"></param>
/// <param name="recipients">sending failure status for these message recipients</param>
/// <returns>An DSNmessage</returns>
public DSNMessage ProduceFailure(IncomingMessage envelope, DirectAddressCollection recipients)
{
if (envelope == null)
{
throw new ArgumentNullException("envelope");
}
if (string.IsNullOrEmpty(m_settings.ProductName))
{
throw new ArgumentException("reportingAgentName:AgentSettings:ProductName");
}
DSNPerMessage perMessage = new DSNPerMessage(envelope.Sender.Host, envelope.Message.IDValue);
//
// Un-Deliverable recipients
//
List<DSNPerRecipient> dsnPerRecipients = envelope.CreatePerRecipientStatus(recipients.AsMailAddresses()
, m_settings.Text, m_settings.AlwaysAck, DSNStandard.DSNAction.Failed, DSNStandard.DSNStatus.Permanent
, DSNStandard.DSNStatus.DELIVERY_OTHER).ToList();
DSN dsn = new DSN(perMessage, dsnPerRecipients);
//Configure and/or dynamic plus refactor
//TODO: Split messages by domain. See envelope.Recipients[0] below.
return envelope.Message.CreateStatusMessage(new MailAddress("Postmaster@" + envelope.Recipients[0].Host), dsn);
}
/// <summary>
/// Return a combined collection of all recipients in routing headers (to/cc/bcc)
/// </summary>
/// <returns>A collection of recipients</returns>
public DirectAddressCollection GetRecipientsInRoutingHeaders()
{
DirectAddressCollection addresses = new DirectAddressCollection();
if (this.To != null)
{
addresses.Add(this.To);
}
if (this.Cc != null)
{
addresses.Add(this.Cc);
}
if (this.Bcc != null)
{
addresses.Add(this.Bcc);
}
return addresses;
}
public void SetRcptTo(DirectAddressCollection recipients)
{
throw new NotImplementedException();
}
/// <summary>
/// Creates an instance from a <see cref="Message"/> instance, with explicitly assigned raw message, recipients and sender,
/// which take precendece over what may be in the message object or text.
/// </summary>
/// <param name="message">The <see cref="Message"/> this envelopes</param>
/// <param name="recipients">The <see cref="DirectAddressCollection"/> of reciepients; takes precedence over the <c>To:</c> header</param>
/// <param name="sender">The <see cref="DirectAddress"/> of the sender; takes precendence over the <c>From:</c> header.</param>
/// <param name="rawMessage">The RFC 5322 message string to use ae the raw message for this instance.</param>
protected MessageEnvelope(Message message, string rawMessage, DirectAddressCollection recipients, DirectAddress sender)
: this(message, recipients, sender)
{
this.RawMessage = rawMessage;
}
/// <summary>
/// Creates an instance from an RFC 5322 message string and explicitly assigned sender and receivers, which take precendence over what may be
/// in the message headers.
/// </summary>
/// <param name="messageText">The RFC 5322 message string to intialize this envelope from. Stored as <c>RawMessage</c></param>
/// <param name="recipients">The <see cref="DirectAddressCollection"/> of reciepients; takes precedence over the <c>To:</c> header</param>
/// <param name="sender">The <see cref="DirectAddress"/> of the sender - typically the MAIL FROM in SMTP; takes precendence over the <c>From:</c> header.</param>
public MessageEnvelope(string messageText, DirectAddressCollection recipients, DirectAddress sender)
: this(MimeSerializer.Default.Deserialize<Message>(messageText), recipients, sender)
{
this.RawMessage = messageText;
}
string CollectNoCertInformation(DirectAddressCollection recipients)
{
if (recipients.IsNullOrEmpty())
{
return string.Empty;
}
StringBuilder builder = new StringBuilder();
foreach(DirectAddress recipient in recipients)
{
if (!recipient.HasCertificates)
{
builder.Append(recipient.Address).Append(';');
}
}
return builder.ToString();
}
/// <summary>
/// Encrypts, verifies recipient trust, and signs an RFC 5322 formatted message
/// The provided sender and recipient addresses will be used instead of the header information in the <c>messageText</c>.
/// </summary>
/// <param name="messageText">
/// An RFC 5322 formatted message string
/// </param>
/// <param name="recipients">
/// An <see cref="DirectAddressCollection"/> instance specifying message recipients.
/// </param>
/// <param name="sender">
/// An <see cref="DirectAddress"/> instance specifying message sender
/// </param>
/// <returns>
/// An <see cref="OutgoingMessage"/> instance containing the encrypted and trust verified message.
/// </returns>
public OutgoingMessage ProcessOutgoing(string messageText, DirectAddressCollection recipients, DirectAddress sender)
{
OutgoingMessage message = new OutgoingMessage(this.WrapMessage(messageText), recipients, sender);
return this.ProcessOutgoing(message);
}
/// <summary>
/// Generate internal notification messages (if any) for this outgoing message
/// </summary>
/// <param name="envelope"></param>
/// <param name="recipients">sending failure status for these message recipients</param>
/// <returns>An DSNmessage</returns>
public DSNMessage ProduceFailure(OutgoingMessage envelope, DirectAddressCollection recipients)
{
if (envelope == null)
{
throw new ArgumentNullException("envelope");
}
if (string.IsNullOrEmpty(m_settings.ProductName))
{
throw new ArgumentException("reportingAgentName:AgentSettings:ProductName");
}
DSNPerMessage perMessage = new DSNPerMessage(envelope.Sender.Host, envelope.Message.IDValue);
//
// Un-Secured recipients
//
List<DSNPerRecipient> dsnPerRecipients = envelope.CreatePerRecipientStatus(recipients.UnResolvedCertificates().AsMailAddresses()
, m_settings.Text, m_settings.AlwaysAck, DSNStandard.DSNAction.Failed, DSNStandard.DSNStatus.Permanent
, DSNStandard.DSNStatus.UNSECURED_STATUS).ToList();
//
// Un-Trusted recipients
//
dsnPerRecipients.AddRange(envelope.CreatePerRecipientStatus(recipients.ResolvedCertificates().AsMailAddresses()
, m_settings.Text, m_settings.AlwaysAck, DSNStandard.DSNAction.Failed, DSNStandard.DSNStatus.Permanent
, DSNStandard.DSNStatus.UNTRUSTED_STATUS).ToList());
DSN dsn = new DSN(perMessage, dsnPerRecipients);
//Configure and/or dynamic plus refactor
return envelope.Message.CreateStatusMessage(new MailAddress("Postmaster@" + envelope.Sender.Host), dsn);
}
/// <summary>
/// Find <c>DirectAddress</c>s without Certificates
/// </summary>
/// <param name="addresses"></param>
/// <returns></returns>
public static DirectAddressCollection UnResolvedCertificates(this DirectAddressCollection addresses)
{
DirectAddressCollection unsecured = new DirectAddressCollection();
foreach (DirectAddress addr in addresses)
{
if ( ! addr.ResolvedCertificates)
{
unsecured.Add(addr);
}
}
return unsecured;
}
void PostProcessIncoming(ISmtpMessage message, IncomingMessage envelope)
{
this.CopyMessage(message, m_settings.Incoming);
if (envelope.HasDomainRecipients)
{
DirectAddressCollection routedRecipients = new DirectAddressCollection();
m_router.Route(message, envelope, routedRecipients);
this.SendNotifications(envelope, routedRecipients);
SendDeliveryStatus(m_router, envelope, routedRecipients);
}
//
// Any recipients that were handled by routes are no longer in the DomainRecipients collection (removed)
// Smtp Server should continue process any domain recipients whose delivery were NOT handled by routes
//
if (m_settings.Incoming.EnableRelay && envelope.HasDomainRecipients)
{
this.SendNotifications(envelope, envelope.DomainRecipients);
//
// We only want the incoming message sent to trusted domain recipients
// We are not allowing arbitrary relay
//
message.SetRcptTo(envelope.DomainRecipients);
m_diagnostics.LogEnvelopeHeaders(message);
}
else
{
//
// SMTP Server need not proceed with delivery because we already routed the message to all domain recipients
//
message.Abort();
}
}
public void SetRcptTo(DirectAddressCollection recipients)
{
throw new NotImplementedException();
}
/// <summary>
/// Remove addresses from Routing headers
/// </summary>
/// <param name="addresses"><see cref="DirectAddressCollection"/> containing addresses to remove</param>
public void RemoveFromRoutingHeaders(DirectAddressCollection addresses)
{
this.UpdateRoutingHeaders(addresses);
}
protected virtual void SendNotifications(IncomingMessage envelope, DirectAddressCollection senders)
{
if (!m_settings.InternalMessage.HasPickupFolder || !m_settings.Notifications.AutoResponse)
{
return;
}
//
// Its ok if we fail on sending notifications - that should never cause us to not
// deliver the message
//
try
{
if(envelope.Message.IsMDN() || envelope.Message.IsDSN())
{
return;
}
m_notifications.Send(envelope, m_settings.InternalMessage.PickupFolder, senders, MDNStandard.NotificationType.Processed);
if(m_settings.Notifications.GatewayIsDestination && envelope.Message.IsTimelyAndReliable())
{
m_notifications.Send(envelope, m_settings.InternalMessage.PickupFolder, senders, MDNStandard.NotificationType.Dispatched);
}
}
catch (Exception ex)
{
Logger.Error("While sending notification {0}", ex.ToString());
}
}
public void ToHeaderNull()
{
DirectAddressCollection addresses = new DirectAddressCollection();
Header header = null;
Assert.DoesNotThrow(() => header = addresses.ToHeader(MailStandard.Headers.To));
Assert.True(header == null);
}
internal void UpdateRoutingHeaders(DirectAddressCollection rejectedRecipients)
{
if (rejectedRecipients.IsNullOrEmpty())
{
return;
}
this.UpdateRecipientHeader(To, MailStandard.Headers.To, rejectedRecipients);
this.UpdateRecipientHeader(Cc, MailStandard.Headers.Cc, rejectedRecipients);
this.UpdateRecipientHeader(Bcc, MailStandard.Headers.Bcc, rejectedRecipients);
}
void UpdateRecipientHeader(DirectAddressCollection recipients, string headerName, IEnumerable<DirectAddress> rejectedRecipients)
{
if (recipients != null)
{
recipients.Remove(rejectedRecipients);
this.Message.Headers[headerName] = recipients.ToHeader(headerName);
}
}
/// <summary>
/// Categorize recipients as follows:
/// - are they in the local domain or are they external
/// </summary>
/// <param name="domains"></param>
internal void CategorizeRecipientsByDomain(AgentDomains domains)
{
DirectAddressCollection recipients = Recipients;
DirectAddressCollection domainRecipients = null;
MailAddressCollection otherRecipients = null;
for (int i = 0, count = recipients.Count; i < count; ++i)
{
DirectAddress address = recipients[i];
if (domains.IsManaged(address))
{
if (domainRecipients == null)
{
domainRecipients = new DirectAddressCollection();
}
domainRecipients.Add(address);
}
else
{
if (otherRecipients == null)
{
otherRecipients = new MailAddressCollection();
}
otherRecipients.Add(address);
}
}
this.DomainRecipients = domainRecipients;
this.OtherRecipients = otherRecipients;
}
internal MessageEnvelope(MessageEnvelope envelope)
{
m_agent = envelope.m_agent;
this.RawMessage = envelope.RawMessage;
m_message = envelope.m_message;
if (envelope.m_recipients != null)
{
m_recipients = new DirectAddressCollection {envelope.m_recipients};
}
m_sender = envelope.m_sender;
m_notifyTo = envelope.m_notifyTo;
}
//
// A CDO Message could be arriving via the SMTP server, or could have been constructed manually
// The one created by SMTP has envelope information
// Returns false if no envelope info is available. We have to look within message headers in that case
//
bool ExtractEnvelopeFields(CDO.Message message, ref DirectAddressCollection recipientAddresses, ref DirectAddress senderAddress)
{
if (!this.HasEnvelope)
{
//
// No envelope
//
return false;
}
recipientAddresses = null;
senderAddress = null;
string sender = message.GetEnvelopeSender();
if (string.IsNullOrEmpty(sender))
{
throw new SmtpAgentException(SmtpAgentError.NoSenderInEnvelope);
}
//
// In SMTP Server, the MAIL TO (sender) in the envelope can be empty if the message is from the server postmaster
// The actual postmaster address is found in the message itself
//
if (Health.Direct.SmtpAgent.Extensions.IsSenderLocalPostmaster(sender))
{
return false;
}
string recipients = message.GetEnvelopeRecipients();
if (string.IsNullOrEmpty(recipients))
{
throw new SmtpAgentException(SmtpAgentError.NoRecipientsInEnvelope);
}
recipientAddresses = DirectAddressCollection.ParseSmtpServerEnvelope(recipients);
senderAddress = new DirectAddress(sender);
return true;
}
void SendDeliveryStatus(IEnumerable <Route> router, IncomingMessage envelope, DirectAddressCollection routedRecipients)
{
if (envelope.Message.IsMDN() || envelope.Message.IsDSN())
{
return;
}
DirectAddressCollection undeliveredRecipients = new DirectAddressCollection();
foreach (var route in router)
{
if (route.FailedDelivery)
{
foreach (var routedRecipient in routedRecipients)
{
if (route.AddressType == routedRecipient.Tag as string)
{
undeliveredRecipients.Add(routedRecipient);
}
}
}
}
try
{
m_notifications.SendFailure(envelope, m_settings.InternalMessage.PickupFolder, undeliveredRecipients);
}
catch (Exception ex)
{
Logger.Error("While sending un-secured DSN {0}", ex.Message);
}
}
//
// Release buffers
//
internal void Clear()
{
RawMessage = null;
m_message = null;
m_sender = null;
m_to = null;
m_cc = null;
m_bcc = null;
m_recipients = null;
m_rejectedRecipients = null;
}
