[courier-users] esmtpd-ssl and firewalls

[bill_taroli]

I've been slowly configuring additional functionality in my Courier (43.0) 
installation, including authenticated and encrypted IMAP and ESMTP. I have 
not had any trouble at all using the IMAP-SSL service over port 993 but I'm 
experiencing some problems with ESMTP-SSL on 465. In particular, this is 
happening when I'm in a corporate environment. I find that in most cases -- 
locally, over internet dial-up connections, etc -- it works fine. So I have 
tried changing the esmtp-ssl port to 8080, thinking that perhaps the port 
was blocked at the firewall, but even that didn't work. 

I have also attempted tunnelling 465 through ssh, but I'm not entirely aware 
of what other ports may be required in each direction, so I can't really say 
that this should or shouldn't work. I can observe the couriersmtp and 
couriertls processes start and show activity, but the message never seems to 
make it in. 

It is also possible that this is a client issue, since I'm using the IMAP 
functionality from within Mozilla... so I've still got the task of trying 
other clients on my list. 

Any suggestions or pointers -- no not middle fingers, thank you -- are 
appreciated. 

Bill

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