Tue, 8 Jan 2013 20:29:30 +0100 skrev DTNX Postmaster <postmas...@dtnx.net>:
... > > The more typical way to do this is for local mail to use the > > submission port 587. Sometimes folks redirect port 25 on the local > > network to 587 as a migration aid. > > > This. Using the submission port is highly recommended, as it avoids > all kinds of trouble, such as access providers blocking port 25. > > It also allows you to tailor each service to its specific needs; > postscreen on 25, required authentication plus TLS and rate limiting > on 587, and so on. > > HTH, > Jona > Thank you for the pointer on submission, I'll be sure to make use of it. But it raises a question (like i wrote in the reply to Noel), and that is (as far as i know) that I need to ensure the use of 587 so users can't "go around" rate limiting on 587 by using 25 for relaying. Would such a thing be possible to do?
