Gentoo Archives: gentoo-user

From: Michael Orlitzky <mjo@g.o>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] mail server administration
Date: Thu, 10 Nov 2016 12:51:00
In Reply to: Re: [gentoo-user] mail server administration by Stroller
1 On 11/10/2016 06:59 AM, Stroller wrote:
2 >
3 > I appreciate mine may be a very naive view of the problems of mail
4 > hosting, but someone who wants to host mail for themselves is coming
5 > at things from a very different position than you are.
6 >
8 As long as you don't have customers, running a mail server can even be
9 fun, but the initial learning curve is bonkers. Before you can do
10 anything, you need to get your IP address whitelisted or added to a
11 feedback loop with all of the major providers. You'll need reverse DNS
12 to match your 'A' record, and you should make sure (use or
13 something like that) that your IP isn't blacklisted anywhere.
15 After that, all you have to do is set up postfix, dovecot, and amavisd.
16 Which ultimately comes down to about 100 lines of configuration... but
17 before you can do it, you need to understand the 25,000 lines of
18 configuration that you don't need and why. All of the HOWTOs are bad,
19 and you need to know how all of the pieces interact if you want to have
20 a chance in hell of debugging delivery issues. That can take weeks.
22 If you want to give it a shot, try to do it one step at a time. Start
23 with postfix delivering to local (system account) mailboxes with no spam
24 filtering. Then add the spam filtering (postscreen, amavis). Then add
25 the virtual accounts. Then add dovecot. Then make postfix talk to
26 dovecot. Then add sieve support. Etc. Your postfix configuration will be
27 tiny at the start (you still need to read through man 5 postconf,
28 though) and that way you'll only need to learn the parts that you're
29 adding. And if it stops working, you know what broke it.