Document information

Document ID:4643
Subject:Secondary SMTP ports
Creation date:12/14/15 4:35 PM
Last modified on:12/14/15 4:35 PM


Using secondary SMTP ports


Xeams includes two servers to accept emails: SMTP Server and SMTP Proxy Server. Both servers can listen on multiple ports to accept emails.

For example the SMTP Server can listen on:
  • Primary SMTP Port - this is typically set to 25
  • Secondary SMTP Port - this is set to -1, which means disabled. Administrators can specify a valid positive value if needed
  • Secure SSL Port - this is set to -1, which means disabled. If needed it can be set to 465, which is the default value for using SSL in SMTP. You will need an SSL certificate in order to enable and use this feature

Purpose of having multiple SMTP Ports

Consider the following scenario:
  • You are using the SMTP server on port 25.  
  • Some of the users connect from their home and their ISP has blocked port 25, which prevents these users from connecting to Xeams. Hence they cannot use Xeams to send emails.
In such cases, you can configure the secondary SMTP port to listen on port 2500 and have these users send their out-bound messages to this port. This way most of the users will use port 25 and some will use 2500


Steps to configure secondary port for SMTP server


  • Log in to Admin Console
  • Click Configure for in the block for Smtp Server Status. Alternatively, you can click SMTP Configuration under Server Configuration.
  • Specify a number between 0 and 65000 for Secondary SMTP Port. We recommend using a value higher than 1024. Lower values may be blocked by firewalls/ISPs.
  • Click Save Config button

Steps to configure secondary port for SMTP Proxy server


  • Log in to Admin Console
  • Click Configure for in the block for Smtp Proxy Server Status.
  • Specify a number between 0 and 65000 for Secondary SMTP Port. We recommend using a value higher than 1024. Lower values may be blocked by firewalls/ISPs.
  • Click Save button





User comments

Posted by Ovidiu Pacuraru on 5/2/16 8:48 AM

Can we use the submission port 587 as secondary smtp port? All I would like to do is offer my authenticated clients access to this port for their outgoing emails, not other smtp servers connecting to mine.


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