Testing communication

Document information

Document ID:4564
Subject:Troubleshooting inbound email
Creation date:12/14/15 4:35 PM
Last modified on:12/14/15 4:35 PM

Troubleshooting problems related to in-bound emails

The following steps assume:
  • A user John (john@BusinessPartner.com) wants to send an email to Mary (mary@YourCompany.com)
  • John is a user on the Internet who may or may not use Xeams
  • Mary is a user on your network and her emails goes through Xeams

Step 1 - John send an email to Mary. John's SMTP server receives the messages.

Step 2 - Johns SMTP server does an MX lookup to find the IP address of Mary's SMTP server. If John's SMTP server is unable to find an MX record, it will generate an NDR (non-delivery report) back to John notifying the server is not found.

Click here to see what could go wrong at this step

Step 3 - Message passes through Mary's firewall. Click here for details

Step 4 - Message is accepted by Xeams. Click here for details.

Step 5 - Message passes through several filters. Each filter assigns a score. Click here for details.

Step 6 - Message is saved in the local repository. Click here for details.

Step 7 - Message is forwarded to the corporate email server. (Applies in Spam Filter or in Hybrid mode). Refer to the SMTPOuboundConversation.log file to see if a message was successfully accepted by the receiving server. You could also refer to any logging available in your corporate email server.

Step 8 - Message is fetched by the user. (Applies in Stand Alone or in Hybrid mode). Messages are either fetched by using IMAP or POP3 protocol. 

User comments

Posted by Tryphon on 6/12/14 7:57 AM

Between steps 2 and 3, there are several ISP which can block the port 25. Is Xeams SMTP server become unusable in this situation?

Posted by Dennis on 6/12/14 9:35 AM

My comment is a reply to Tryphon's question. <br><br> Yes - you need port 25 open from your ISP if you wish to run an email server. Emails go from one SMTP server to another and they always talk on port 25. <br><br> There are third party service providers who will accept your emails on a different port and then forward them to the actual recipient. These services are usually not free.

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