Mailing List Message #92230
From: Bret Miller <>
Subject: RE: MAPI & SMTP port
Date: Wed, 15 Aug 2007 11:06:48 -0700
To: CommuniGate Pro Discussions <>
X-Mailer: CommuniGate Pro MAPI Connector 1.2.12/1.2.12(local)
> Hello all,
>    We are getting ready to move our clients from sending smtp
> on port  
> 25 to sending on a different port to avoid problems with ISPs  
> blocking outbound port 25 traffic. However, we have a group of test  
> users who are using MAPI, and we have not been able to find the  
> setting to change the outbound port. Could anyone offer some  
> clarification? Does a MAPI connection do everything through port 143?

Yes, with MAPI, messages are send via the CGPro IMAP extension XSUBMIT
command, so everything is port 143 (unless you're using SSL).


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