Best practice for SMTP relay with user authentication
Per olof Ljungmark
peo at intersonic.se
Sun Aug 12 07:57:48 PDT 2007
Erik Norgaard wrote:
> Hi:
>
> I have my postfix authenticate users before accepting mail for non-local
> delivery. Till now, users can connect to port 25 and 465 (smtps) use
> STARTTLS and authenticate.
>
> But, I stumbled upon submission port 587 which is not reserved - it
> appeas - for a protocol but for a use?
>
> I'd like to align my configuration with best practice. Should I just
> move postfix to bind to port 587 or did I misunderstand that submission
> is indeed a different protocol? Is there any best practice for which
> protocol should be used for submission?
I'm not an authority on the subject but we use it here for
server-to-server. Here's a link to more reading:
http://www.faqs.org/rfcs/rfc2476.html
We use port 465 for authenticated MUA-to-MTA.
Per olof
More information about the freebsd-questions
mailing list