Neil Aggarwal:
> Wieste:
>
> It looks like I have a bigger problem.
>
> I am trying to use port 25.
> When I do telnet mail.nsa-lp.com 25 on my local computer,
> I get a connection time out.
Port 25 is for MTA-to-MTA connection.
The (legacy) smtps and (preferred) submission ports are for
MUA-to-MTA connection, and are usually left open by ISPs.
Wietse
> I wonder if my ISP is blocking port 25.
> I can connect to port 995 just fine.
>
> I tried to telnet to port 465 and it hits the firewall on the server.
> I guess I will have to configure postfix to use that.
>
> Thanks,
> Neil
>
> --
> Neil Aggarwal, (972)834-1565, http://UnmeteredVPS.net/centos
> Virtual private server with CentOS 6 preinstalled
> Unmetered bandwidth = no overage charges
>
>
> -----Original Message-----
> From: owner-postfix-us...@postfix.org
> [mailto:owner-postfix-us...@postfix.org] On Behalf Of Wietse Venema
> Sent: Saturday, June 23, 2012 8:33 AM
> To: Postfix users
> Subject: Re: Trouble using StartSSL certificate for tls
>
> Neil Aggarwal:
> > Hmmm. I was testing this because Outlook is not able to send a
> > test message through my server.
>
> What are the symptoms:
>
> Does Outlook connect to TCP port 25 (smtp), 465 (smtps), or 587
> (submission)? Each port has a different configuration template in
> master.cf.
>
> POSTFIX logging.
>
> OUTLOOK error messages.
>
> Wietse
>
>
