Hi all,
OK, I think I've made a final decision on what I'd like to do.
I think I'm going to setup two of the 1U boxes we have (the 3.06 ghz
machines with IDE drives). I'm going to call one "relay1" and one "relay2".
I'm going to setup MX records for the 500+ domains we have. Half of them
will have relay1 as their primary and half of them will have relay2 as
their primary. The remaining server will be set as secondary MX.
These two 1U boxes will be IDENTICAL and have support for ALL domains.
Upon processing of spam and antivirus, each box will then relay the mail
directly to the mail server. All the mail server will do is receive the
processed emails and deliver them.
The reason I decided this is for a few reasons:
1) Tonight I upgraded nss_ldap on the mail server and I messed some
stuff up bad (it worked on the testing box, btw). It took me 20 minutes
to fix it.
2) Mail processing is easy. Spam and antivirus processing is a bit more
complicated process. Since I'll have two boxes doing the processing, I
can easily take one of the boxes down if something goes wrong (IE, I can
take relay1 down at anytime, and relay2 will still function for all mail
because of backup MX records).
3) It takes the load off the mail server and "uncomplicates" things. If
something on the mail server breaks, I'll have to figure out whether its
the LDA, MTA, amavisd, spamd, or antivirus, or even LDAP. Now, I divide
it up a bit to make things easier.
Please let me know what all of you think about this final idea. In the
end it leaves me with a three server setup but at least things will be a
bit more spread out, and I'll have nice backup processing servers.
Regards,
Matt
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