/// <summary> /// Queues the email for relaying. /// </summary> private async Task <SmtpServerTransactionAsyncResult> QueueForRelayingAsync() { // The email is for relaying. Guid messageID = Guid.NewGuid(); // Look for any MTA control headers. MessageHeaderCollection headers = MessageManager.GetMessageHeaders(Data); // Will not be null if the SendGroupID header was present. MessageHeader ipGroupHeader = headers.SingleOrDefault(m => m.Name.Equals(MessageHeaderNames.SendGroupID, StringComparison.OrdinalIgnoreCase)); // Parameter will hold the MtaIPGroup that will be used to relay this message. VirtualMtaGroup mtaGroup = null; int ipGroupID = 0; if (ipGroupHeader != null) { if (int.TryParse(ipGroupHeader.Value, out ipGroupID)) { mtaGroup = VirtualMtaManager.GetVirtualMtaGroup(ipGroupID); } } #region Look for a send id, if one doesn't exist create it. MessageHeader sendIdHeader = headers.SingleOrDefault(h => h.Name.Equals(MessageHeaderNames.SendID, StringComparison.OrdinalIgnoreCase)); int internalSendId = -1; if (sendIdHeader != null) { Send sndID = await SendManager.Instance.GetSendAsync(sendIdHeader.Value); if (sndID.SendStatus == SendStatus.Discard) { return(SmtpServerTransactionAsyncResult.FailedSendDiscarding); } internalSendId = sndID.InternalID; } else { Send sndID = await SendManager.Instance.GetDefaultInternalSendIdAsync(); if (sndID.SendStatus == SendStatus.Discard) { return(SmtpServerTransactionAsyncResult.FailedSendDiscarding); } internalSendId = sndID.InternalID; } #endregion #region Generate Return Path string returnPath = string.Empty; // Can only return path to messages with one rcpt to if (RcptTo.Count == 1) { // Need to check to see if the message contains a return path overide domain. MessageHeader returnPathDomainOverrideHeader = headers.SingleOrDefault(h => h.Name.Equals(MessageHeaderNames.ReturnPathDomain, StringComparison.OrdinalIgnoreCase)); if (returnPathDomainOverrideHeader != null && MtaParameters.LocalDomains.Count(d => d.Hostname.Equals(returnPathDomainOverrideHeader.Value, StringComparison.OrdinalIgnoreCase)) > 0) { // The message contained a local domain in the returnpathdomain // header so use it instead of the default. returnPath = ReturnPathManager.GenerateReturnPath(RcptTo[0], internalSendId, returnPathDomainOverrideHeader.Value); } else { // The message didn't specify a return path overide or it didn't // contain a localdomain so use the default. returnPath = ReturnPathManager.GenerateReturnPath(RcptTo[0], internalSendId); } // Insert the return path header. Data = MessageManager.AddHeader(Data, new MessageHeader("Return-Path", "<" + returnPath + ">")); } else { // multiple rcpt's so can't have unique return paths, use generic mail from. returnPath = MailFrom; } #endregion #region Generate a message ID header string msgIDHeaderVal = "<" + messageID.ToString("N") + MailFrom.Substring(MailFrom.LastIndexOf("@")) + ">"; // If there is already a message header, remove it and add our own. required for feedback loop processing. if (headers.Count(h => h.Name.Equals("Message-ID", StringComparison.OrdinalIgnoreCase)) > 0) { Data = MessageManager.RemoveHeader(Data, "Message-ID"); } // Add the new message-id header. Data = MessageManager.AddHeader(Data, new MessageHeader("Message-ID", msgIDHeaderVal)); #endregion #region Get message priority var msgPriority = RabbitMqPriority.Low; var priorityHeader = headers.GetFirstOrDefault(MessageHeaderNames.Priority); if (priorityHeader != null) { var outVal = 0; if (int.TryParse(priorityHeader.Value, out outVal)) { if (outVal >= 0) { msgPriority = outVal < 3 ? (RabbitMqPriority)(byte)outVal : RabbitMqPriority.High; } } } #endregion // Remove any control headers. headers = new MessageHeaderCollection(headers.Where(h => h.Name.StartsWith(MessageHeaderNames.HeaderNamePrefix, StringComparison.OrdinalIgnoreCase))); foreach (MessageHeader header in headers) { Data = MessageManager.RemoveHeader(Data, header.Name); } // If the MTA group doesn't exist or it's not got any IPs, use the default. if (mtaGroup == null || mtaGroup.VirtualMtaCollection.Count == 0) { ipGroupID = VirtualMtaManager.GetDefaultVirtualMtaGroup().ID; } // Attempt to Enqueue the Email for Relaying. var enqueued = await QueueManager.Instance.Enqueue(messageID, ipGroupID, internalSendId, returnPath, RcptTo.ToArray(), Data, msgPriority); return(enqueued ? SmtpServerTransactionAsyncResult.SuccessMessageQueued : SmtpServerTransactionAsyncResult.FailedToEnqueue); }
/// <summary> /// Adds a header to the message data. /// </summary> /// <param name="name">The header name.</param> /// <param name="value">Value for the header.</param> public void AddHeader(string name, string value) { Data = MessageManager.AddHeader(Data, new MessageHeader(name, value)); }