Group: linux.gentoo.user
From: Grant
Date: Sunday, February 17, 2008 2:30 PM
Subject: Re: [gentoo-user] SSL CUPS and SMTP on port 587

> >>> My ISP (Cox) blocks outgoing port 25 so I can't submit mail to my
> >>> remote mail server. From what I understand, port 587 is commonly used
> >>> to get around this. Can I have postfix listen on port 25 and port
> >>> 587? Has anyone set that up?
> >> I do it slightly differently: I leave an SSH connection from my box to
> >> the mail server, which maps some local port to port 25 on the mail
> >> server, and send all my mail to the local port.
> >
> > Yeah I think I'll do that if port 587 doesn't work out. From what I
> > understand, using 587 in this way is somewhat of a standard?
>
> In your master.cf uncomment the following lines and then restart
> Postfix. It should just work if you already have TLS setup.
>
> smtps inet n - n - - smtpd
> -o smtpd_tls_wrappermode=yes
>
> kashani

I uncommented the above line and added the following to main.cf:

smtpd_tls_security_level = may

as instructed here:

http://www.postfix.org/TLS_README.html#server_enable

and restarted postfix, but I still can't send. In claws-mail, I tried
specifying 587 and I'm specifying Use SSL for SSMTP. I'm guessing TLS
isn't set up properly?

- Grant
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