[CentOS] Re: Planning Mail Server (with low resources)

Tue Dec 6 14:40:12 UTC 2005
Rodrigo Barbosa <rodrigob at suespammers.org>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Tue, Dec 06, 2005 at 10:27:24PM +0800, Feizhou wrote:
> Forget mailscanner. Use postfix with clamsmtpd and clamav for AV. As for 
> spam, the best defence is NOT to accept spams in the first place. Making 
> good use of RBLs like the SBL, XBL, SORBS RBLs and the other suggestion 
> of using SURBL in spamassassin should keep the spam problem to a minimum 
> and this again is mostly postfix related except for spamassassin.

That depends on how you see it. If you are thinking about the spam ratio,
yes, you are correct. RBLs can filter up to 90% of all the spam (in my
experience). On the other hand, if you are being targeted by 1000's of
spams daily, you will still get a fair number of them.

> I would suggest otherwise. Your huge /var/spool/mail suggests that you 
> plan to use the mbox format for storing mails. I suggest that you switch 
> to maildir and therefore trash /var/spool/mail and allocate that lot to 
> /home and use maildir to store your mails.

As I stated before, one of the best things about maildir is that you
can use incremental backup procedures. So I second that idea, no
matter if you are keeping the maildirs on /home or /var/spool/mail.

> Yes. I suggest running two queues. postfix + clamsmtpd + clamav, first 
> line of defence (RBLs and other gateway blocking). Mails that get 
> through should then be delivered to a qmail queue which will give you 
> very low resource taking processes and a maildir delivery system with 
> the most versatile local delivery agent possible. dovecot can be used as 
> the imap server.

Is it really recomended (cost/benefit) to mix two different MTA's ?
I never tried that. I just start on the idea that it would simply
add too much complexity. Then again, I might be misinformed, and
the benefits be enough to make it worth. Care you elaborate a little
more on that one, please ?

[]s

- -- 
Rodrigo Barbosa <rodrigob at suespammers.org>
"Quid quid Latine dictum sit, altum viditur"
"Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (GNU/Linux)

iD8DBQFDlaLMpdyWzQ5b5ckRAhPuAJ4gnrRyCGneLaNX8HbIUZdZT+SXbACfdDV9
3As7URwYjRwJj5jxxByZhEg=
=zMd5
-----END PGP SIGNATURE-----