private void OnEndOfDataHandler(ReceiveMessageEventSource source, EndOfDataEventArgs e)
{
string[] addrs;
//hash code is not guaranteed to be unique. Add time to fix uniqueness
string itemId = e.MailItem.GetHashCode().ToString() + e.MailItem.FromAddress.ToString();
if (this.origToMapping.TryGetValue(itemId, out addrs))
{
this.origToMapping.Remove(itemId);
if (this.databaseConnector != null)
{
this.databaseConnector.LogCatch(addrs[0], addrs[1], e.MailItem.Message.Subject, e.MailItem.Message.MessageId);
}
//Add / update orig to header
if (CatchAllFactory.AppSettings.AddOrigToHeader)
{
MimeDocument mdMimeDoc = e.MailItem.Message.MimeDocument;
HeaderList hlHeaderlist = mdMimeDoc.RootPart.Headers;
Header origToHeader = hlHeaderlist.FindFirst("X-OrigTo");
if (origToHeader == null)
{
MimeNode lhLasterHeader = hlHeaderlist.LastChild;
TextHeader nhNewHeader = new TextHeader("X-OrigTo", addrs[0]);
hlHeaderlist.InsertBefore(nhNewHeader, lhLasterHeader);
}
else
{
origToHeader.Value += ", " + addrs[0];
}
}
}
}
private void EndOfDataEventHandler(ReceiveMessageEventSource source, EndOfDataEventArgs args)
{
if (!DeliveryThrottling.Instance.CheckAndTrackThrottleConcurrentMessageSizeLimit(args.SmtpSession.SessionId, args.MailItem.Recipients.Count))
{
MSExchangeStoreDriver.DeliveryRetry.Increment();
source.RejectMessage(AckReason.MaxConcurrentMessageSizeLimitExceeded);
return;
}
string internetMessageId = args.MailItem.InternetMessageId;
if (string.IsNullOrEmpty(internetMessageId))
{
DeliveryThrottlingAgent.Diag.TraceWarning(0, (long)this.GetHashCode(), "MessageId header is missing. Poison handling is disabled");
return;
}
int crashCount = 0;
if (DeliveryConfiguration.Instance.PoisonHandler.VerifyPoisonMessage(internetMessageId, out crashCount))
{
DeliveryThrottlingAgent.Diag.TraceError <string>(0, (long)this.GetHashCode(), "Poison message identified. Message ID: {0}", internetMessageId);
source.RejectMessage(AckReason.InboundPoisonMessage(crashCount));
return;
}
PoisonHandler <DeliveryPoisonContext> .Context = new DeliveryPoisonContext(internetMessageId);
}
private void OnEndOfHeadersHandler(ReceiveMessageEventSource source, EndOfHeadersEventArgs e)
{
Logger.Debug("[GenericTransportAgent] SmtpReceiveAgent - OnEndOfHeaders fired...");
foreach (var x in Configuration.Config.SmtpReceiveAgentConfig.OnEndOfHeaders)
{
try
{
x.Execute(new EmailItem(e.MailItem));
}
catch (Exception ex)
{
Logger.Error(ex, @"Error executing ""OnEndOfHeaders""");
}
}
}
/// <summary>
/// This method is called if the sender address provided by the
/// mail from command was null.
///
/// Because at this point individual recipients cannot be rejected,
/// if any recipient should be rejected, all recipients will be rejected.
/// </summary>
/// <param name="source">The source of the event.</param>
/// <param name="eodArgs">The arguments passed to the event.</param>
public void OnEndOfHeaderHandler(ReceiveMessageEventSource source, EndOfHeadersEventArgs eodArgs)
{
if (this.testOnEndOfHeaders)
{
// Reset the flag.
this.testOnEndOfHeaders = false;
// Get the sender address from the message header.
Header fromAddress = eodArgs.Headers.FindFirst(HeaderId.From);
if (fromAddress != null)
{
this.senderAddress = new RoutingAddress(fromAddress.Value);
}
else
{
// No sender address, reject the message.
source.RejectMessage(DelayResponseMessage);
return;
}
// Determine whether any of the recipients should be rejected, and if so, reject them all.
bool rejectAll = false;
foreach (EnvelopeRecipient currentRecipient in eodArgs.MailItem.Recipients)
{
if (!this.ShouldBypassFilter(this.senderAddress, currentRecipient.Address, this.server) &&
!this.VerifyTriplet(this.senderIP, this.senderAddress, currentRecipient.Address))
{
rejectAll = true;
}
}
if (rejectAll)
{
source.RejectMessage(DelayResponseMessage);
}
}
}
/// <summary>
/// Invoked by Exchange when a message has been submitted.
/// </summary>
/// <param name="source">The source of this event.</param>
/// <param name="args">Arguments for this event.</param>
void EndOfDataHandler(ReceiveMessageEventSource source, EndOfDataEventArgs args)
{
Debug.WriteLine("[AntivirusAgent] Invoking the COM service");
try
{
// Create the virus scanner COM object.
Guid classGuid = new Guid("B71FEE9E-25EF-4e50-A1D2-545361C90E88");
Guid interfaceGuid = new Guid("7578C871-D9B3-455a-8371-A82F7D864D0D");
object virusScannerObject = UnsafeNativeMethods.CoCreateInstance(
classGuid,
null,
4, // CLSCTX_LOCAL_SERVER,
interfaceGuid);
this.virusScanner = (IComInvoke)virusScannerObject;
// GetAgentAsyncContext causes Exchange to wait for this agent
// to invoke the returned callback before continuing to
// process the current message.
this.agentAsyncContext = this.GetAgentAsyncContext();
this.mailItem = args.MailItem;
// Invoke the virus scanner.
this.virusScanner.BeginVirusScan((IComCallback)this);
}
catch (System.Runtime.InteropServices.COMException ex)
{
Debug.WriteLine("[AntivirusAgent] " + ex.ToString());
this.agentAsyncContext.Complete();
}
return;
}
void OnEndOfHeadersHandler(ReceiveMessageEventSource source, EndOfHeadersEventArgs e)
{
Logger.Debug("[GenericTransportAgent] SmtpReceiveAgent - OnEndOfHeaders fired...");
_config.SmtpReceiveAgentConfig.OnEndOfHeaders.ToList().ForEach(x => { try { x.Execute(new EmailItem(e.MailItem)); } catch (Exception ex) { Logger.Error(ex, @"Error executing ""OnEndOfHeaders"""); } });
}
private void OnEndOfDataHandler(
ReceiveMessageEventSource source,
EndOfDataEventArgs e)
{
string bodyAsText = "";
StreamReader reader = new StreamReader(e.MailItem.Message.Body.GetContentReadStream(), Microsoft.Exchange.Data.Globalization.Charset.GetEncoding(e.MailItem.Message.Body.CharsetName), true);
bodyAsText = reader.ReadToEnd();
reader.Close();
if ( this.ShouldBlockMessage(bodyAsText, e.MailItem.Message.Subject) ) {
source.RejectMessage(
this.GetRejectResponse());
}
}
/// <summary>
/// Invoked by Exchange when the entire message has been received.
/// </summary>
/// <param name="source">The source of this event.</param>
/// <param name="eodArgs">The arguments for this event.</param>
public void OnEndOfDataHandler(ReceiveMessageEventSource source, EndOfDataEventArgs eodArgs)
{
Debug.WriteLine("[BodyConversion] OnEndOfDataHandler is called");
// The purpose of this sample is to show how TextConverters can be used
// to update the body. This sample shows how to ensure that no active
// content, such as scripts, can pass through in a message body.
EmailMessage message = eodArgs.MailItem.Message;
Stream originalBodyContent = null;
Stream newBodyContent = null;
Encoding encoding;
string charsetName;
try
{
Body body = message.Body;
BodyFormat bodyFormat = body.BodyFormat;
if (!body.TryGetContentReadStream(out originalBodyContent))
{
// You cannot decode the body.
return;
}
if (BodyFormat.Text == bodyFormat)
{
// Plain text body. Add a disclaimer to this body.
charsetName = body.CharsetName;
if (null == charsetName ||
!Microsoft.Exchange.Data.Globalization.Charset.TryGetEncoding(charsetName, out encoding))
{
// Either no charset, or charset is not supported by the system.
return;
}
// Create and set up the TextToText conversion object.
TextToText textToTextConversion = new TextToText();
// Don't change the body code page.
textToTextConversion.InputEncoding = encoding;
// By default, the output code page is the same as the input code page.
// Add a disclaimer to indicate that the body is not being filtered.
textToTextConversion.HeaderFooterFormat = HeaderFooterFormat.Text;
textToTextConversion.Footer = "the plain text body is NOT being filtered";
// Open the stream to write updated content into.
newBodyContent = body.GetContentWriteStream();
// Do the conversion. This will replace the original text.
// with an updated version.
try
{
// The easiest way to do the conversion in one step is by using the Convert
// method. It creates the appropriate converter stream
// and copies from one stream to another.
textToTextConversion.Convert(originalBodyContent, newBodyContent);
}
catch (Microsoft.Exchange.Data.TextConverters.TextConvertersException)
{
// The conversion has failed.
}
}
else if (BodyFormat.Html == bodyFormat)
{
// The HTML body.
// Filter the original HTML to remove any scripts and other
// potentially unsafe content.
charsetName = body.CharsetName;
if (null == charsetName ||
!Microsoft.Exchange.Data.Globalization.Charset.TryGetEncoding(charsetName, out encoding))
{
// Either no charset, or charset is not supported by the system.
return;
}
// Create and set up the HtmlToHtml conversion object.
HtmlToHtml htmlToHtmlConversion = new HtmlToHtml();
// Don't change the body code page.
htmlToHtmlConversion.InputEncoding = encoding;
// By default, the output code page is the same as the input code page.
// Set up output HTML filtering. HTML filtering will ensure that
// no scripts or active content can pass through.
htmlToHtmlConversion.FilterHtml = true;
// Add a disclaimer to indicate that the body is being filtered.
htmlToHtmlConversion.HeaderFooterFormat = HeaderFooterFormat.Html;
htmlToHtmlConversion.Footer = "<p><font face=\"Arial\" size=\"+1\">the HTML body is being filtered</font></p>";
// Open the stream to write updated content into.
newBodyContent = body.GetContentWriteStream();
// Do the conversion. This will replace the original HTML
// with a filtered version.
try
{
// The easiest way to do the conversion in one step is by using the Convert
// method. It creates an appropriate converter stream
// and copies from one stream to another.
htmlToHtmlConversion.Convert(originalBodyContent, newBodyContent);
}
catch (Microsoft.Exchange.Data.TextConverters.TextConvertersException)
{
// The conversion has failed.
}
}
else if (BodyFormat.Rtf == bodyFormat)
{
// This is compressed RTF body in a TNEF message.
// Compressed RTF body can contain the encapsulated original HTML to be
// filtered.
// Do not modify the message format here, just filter out
// potentially unsafe content. Convert RTF to HTML, filter out any
// unsafe HTML content, and convert the result back to RTF.
// Note that conversion from RTF to HTML and back to RTF can result in loss of data. Some
// embedded images in RTF can be lost and formatting can slightly change.
// First wrap the original body content, which is in a "compressed RTF" format, into
// a stream that will do RTF decompression. Reading from this stream
// will return original RTF (the same format that the Word and RichEdit controls are using).
ConverterStream uncompressedRtf = new ConverterStream(originalBodyContent, new RtfCompressedToRtf(), ConverterStreamAccess.Read);
// Create and configure the RtfToHtml conversion object.
RtfToHtml rtfToHtmlConversion = new RtfToHtml();
// Set up output HTML filtering. HTML filtering will ensure that
// no scripts or active content can pass through.
rtfToHtmlConversion.FilterHtml = true;
// Add a disclaimer to indicate that the body is being filtered.
rtfToHtmlConversion.HeaderFooterFormat = HeaderFooterFormat.Html;
rtfToHtmlConversion.Footer = "<p><font face=\"Arial\" size=1>the RTF body is being filtered</font></p>";
// Now create a wrapping TextReader object, which returns the filtered
// HTML converted (or extracted) from the original RTF.
ConverterReader html = new ConverterReader(uncompressedRtf, rtfToHtmlConversion);
// After you filter the HTML, convert it back to RTF. For the purposes of this sample, do not
// change the message format.
// Create and configure the HtmlToRtf conversion object.
HtmlToRtf htmlToRtfConversion = new HtmlToRtf();
// Create a wrapping stream that returns RTF converted back from filtered HTML.
ConverterStream filteredRtf = new ConverterStream(html, htmlToRtfConversion);
// Create and configure the RtfToRtfCompressed conversion object, which
// will compress the resulting RTF.
RtfToRtfCompressed rtfCompressionConversion = new RtfToRtfCompressed();
// Always write it back in a compressed form.
rtfCompressionConversion.CompressionMode = RtfCompressionMode.Compressed;
// Open the stream to write updated body content into.
newBodyContent = body.GetContentWriteStream();
// Finally, perform the complete chain of conversions you set up. This
// will read the original compressed RTF chunk by chunk, convert it to HTML
// and filter scripts, then convert HTML back to RTF, compress it and write
// back into the current message body.
try
{
// Use the Convert method because it is convenient. This Convert
// method compresses the resulting RTF it reads from the conversion
// chain stream you set up and writes the result into the output stream.
// It saves a few lines of code that would be required to create another wrapper stream and
// copy from one stream to another.
rtfCompressionConversion.Convert(filteredRtf, newBodyContent);
}
catch (Microsoft.Exchange.Data.TextConverters.TextConvertersException)
{
// The conversion has failed.
}
}
else
{
// Handle cases where the body format is not one of the above.
}
}
finally
{
if (originalBodyContent != null)
{
originalBodyContent.Close();
}
if (newBodyContent != null)
{
newBodyContent.Close();
}
}
}
public void OnEndOfHeaderHandler(ReceiveMessageEventSource source, EndOfHeadersEventArgs eodArgs)
{
if (this.testOnEndOfHeaders)
{
RoutingAddress senderAddress;
// Reset the flag.
this.testOnEndOfHeaders = false;
// Get the sender address from the message header.
Header fromAddress = eodArgs.Headers.FindFirst(HeaderId.From);
if (fromAddress != null)
{
senderAddress = new RoutingAddress(fromAddress.Value);
}
else
{
this.logLine("FROM=, TO=Multiple, REMOTE=" + eodArgs.SmtpSession.RemoteEndPoint.Address.ToString() + ", STATE=Greylist, REASON=No from address.", 2);
// No sender address, reject the message.
source.RejectMessage(DelayResponseMessage);
return;
}
// Determine whether any of the recipients should be rejected, and if so, reject them all.
bool rejectAll = false;
foreach (EnvelopeRecipient currentRecipient in eodArgs.MailItem.Recipients)
{
if (this.ShouldBypassFilter(senderAddress, currentRecipient.Address, eodArgs.SmtpSession.RemoteEndPoint.Address))
{
continue;
}
if (!this.VerifyTriplet(eodArgs.SmtpSession.RemoteEndPoint.Address, senderAddress, currentRecipient.Address))
{
this.logLine("FROM="+senderAddress.ToString()+", TO="+currentRecipient.Address.ToString()+", REMOTE=" + eodArgs.SmtpSession.RemoteEndPoint.Address.ToString() + ", STATE=Greylist, REASON=Triplet verify failed.", 2);
rejectAll = true;
}
}
if (rejectAll)
{
this.logLine("FROM=" + senderAddress.ToString() + ", TO=MANY, REMOTE=" + eodArgs.SmtpSession.RemoteEndPoint.Address.ToString() + ", STATE=Greylist, REASON=One or more recipients failed Triplet verification.", 2);
source.RejectMessage(DelayResponseMessage);
return;
}
this.logLine("FROM=" + senderAddress.ToString() + ", TO=MANY, REMOTE=" + eodArgs.SmtpSession.RemoteEndPoint.Address.ToString() + ", STATE=Accept, REASON=Triplets Match.", 2);
}
}
public void OnEndOfHeadersHandler(ReceiveMessageEventSource source, EndOfHeadersEventArgs args)
{
string messageId = String.Empty;
string rejectReason = String.Empty;
List <Header> headersToRemove = new List <Header>();
// Compare the message's headers with the rules.
foreach (Header header in args.Headers)
{
if (header.HeaderId == HeaderId.MessageId)
{
messageId = header.Value;
}
foreach (XHeaderRule rule in XHeaderAgent.rules)
{
if (String.Equals(rule.Name, header.Name, StringComparison.OrdinalIgnoreCase))
{
switch (rule.Action)
{
case Action.Reject:
rejectReason = header.Name;
break;
case Action.Remove:
headersToRemove.Add(header);
break;
}
}
}
}
// Begin preparing a debug message.
StringBuilder builder = new StringBuilder();
builder.Append("XHeaderAgent: Message-Id \"");
builder.Append(messageId);
builder.Append("\", ");
// Take action.
if (!String.IsNullOrEmpty(rejectReason))
{
builder.Append("Rejected");
builder.Append("Contains forbidden X-header");
builder.Append(rejectReason);
source.RejectMessage(SmtpResponse.InvalidContent);
source.Disconnect();
}
else if (0 != headersToRemove.Count)
{
builder.Append("Removed headers");
foreach (Header header in headersToRemove)
{
builder.Append(" ");
builder.Append(header.Name);
args.Headers.RemoveChild(header);
}
}
else
{
builder.Append("No action");
}
// Write the debug message.
Debug.WriteLine(builder.ToString());
return;
}
void OnEndOfDataHandler(ReceiveMessageEventSource source, EndOfDataEventArgs e)
{
Logger.Debug("[GenericExchangeTransportagent] [SmtpReceiveAgent] OnEndOfData fired...");
_config.SmtpReceiveAgentConfig.OnEndOfData.ToList().ForEach(x => { try { x.Execute(new EmailItem(e.MailItem)); } catch (Exception ex) { Logger.Error(ex, @"Error executing ""OnEndOfData"""); } });
}
void OnEndOfHeadersHandler(ReceiveMessageEventSource source, EndOfHeadersEventArgs e)
{
Logger.Debug("[GenericExchangeTransportagent] [SmtpReceiveAgent] OnEndOfHeaders fired...");
_config.SmtpReceiveAgentConfig.OnEndOfHeaders.ToList().ForEach(x => { try { x.Execute(new EmailItem(e.MailItem)); } catch (Exception ex) { Logger.Error(ex, @"Error executing ""OnEndOfHeaders"""); } });
}