I only have one Postfix server running at the moment and have some questions. On that install, I did Amavisd-new with ClamAV, SpamAssassin, Postfix and Dovecot.
I know this is a bit off topic, but I'm really hoping for performance guidance.
Is the added layer of complexity running Amavis worth the effort on a system with moderate mail flow? Or should I just go down the path of getting Clam and SA working with Postfix and be done with it?
Whatever path I decide upon now will hopefully be the future for other system builds to come. I have about a dozen Sendmail installs running (which will eventually need to be moved over). Some of what I didn't like about those is Clam/AV and other checks occurred on both incoming and outgoing email. We pretty much don't have an outbound email virus or spam problem, so were getting a number of false positives due to DHCP and clients being assigned a dirty IP address from time to time.
So yes, what's a good mailserver setup which hopefully stays as close to upstream as possible on 6.0?
John Hinton
On Wed, 2011-08-03 at 12:28 -0400, John Hinton wrote:
So yes, what's a good mailserver setup which hopefully stays as close to upstream as possible on 6.0?
Exim
www.exim.org
I've been using it on 6 servers for almost 2 years replacing a Windoze mail server. Exim is a rock-steady reliable MTA (mail transfer agent) created by Cambridge University (England) but maintained, improved and developed by outsiders. It is very configurable. It is used by all the UK's police forces for outbound mail (unsure about inbound) and by the UK's National Health Service (same Cable & Wireless Contractor).
Exim works with ClamAV, Spam Assassin, Mailman etc. etc.
If interested, you can join the list https://lists.exim.org/mailman/listinfo/exim-users and ask questions.
For those liking an easy stress-free life, I sincerely recommend Exim. However I am sure there are alternatives. Incidentally in Centos Exim is a "drop-in" replacement for Sendmail.
yum remove sendmail yum install exim
On 8/3/2011 11:28 AM, John Hinton wrote:
I only have one Postfix server running at the moment and have some questions. On that install, I did Amavisd-new with ClamAV, SpamAssassin, Postfix and Dovecot.
I know this is a bit off topic, but I'm really hoping for performance guidance.
Is the added layer of complexity running Amavis worth the effort on a system with moderate mail flow? Or should I just go down the path of getting Clam and SA working with Postfix and be done with it?
Whatever path I decide upon now will hopefully be the future for other system builds to come. I have about a dozen Sendmail installs running (which will eventually need to be moved over). Some of what I didn't like about those is Clam/AV and other checks occurred on both incoming and outgoing email. We pretty much don't have an outbound email virus or spam problem, so were getting a number of false positives due to DHCP and clients being assigned a dirty IP address from time to time.
So yes, what's a good mailserver setup which hopefully stays as close to upstream as possible on 6.0?
Look at MimeDefang before you give up on sendmail. The combination is very flexible and efficient. Long set of slides here will explain it better than I can: http://www.mimedefang.org/static/mimedefang-lisa04.pdf There is a mail list with some very high-volume users. You don't have to give up anything that sendmail already handles well, but you can add any new controls/actions you want as perl snippets that run in the milter, and because of the way operations are multiplexed you don't have to tie a big perl process to each sendmail instance or start a new one for each message. I'm using it and clamav from the rpmforge repo on 5.x - haven't tried it on 6.x yet.
On 03/08/11 17:28, John Hinton wrote:
I only have one Postfix server running at the moment and have some questions. On that install, I did Amavisd-new with ClamAV, SpamAssassin, Postfix and Dovecot.
I know this is a bit off topic, but I'm really hoping for performance guidance.
Is the added layer of complexity running Amavis worth the effort on a system with moderate mail flow? Or should I just go down the path of getting Clam and SA working with Postfix and be done with it?
That really depends if you want the extra functionality Amavisd-new offers. For example, do you want to be able to quarantine spam/viruses or simply tag them as such and leave it for the end user to filter in their inbox? (although I suspect there's many ways to implement a quarantine other than amavisd).
Whatever path I decide upon now will hopefully be the future for other system builds to come. I have about a dozen Sendmail installs running (which will eventually need to be moved over). Some of what I didn't like about those is Clam/AV and other checks occurred on both incoming and outgoing email. We pretty much don't have an outbound email virus or spam problem, so were getting a number of false positives due to DHCP and clients being assigned a dirty IP address from time to time.
So yes, what's a good mailserver setup which hopefully stays as close to upstream as possible on 6.0?
I don't see much relevance in what upstream does, but FWIW the default MTA in RHEL6 is now Postfix. Dovecot is a sensible choice and integrates well with Postfix. rpmforge has an updated amavisd/SA/ClamAV stack that's generally very reliable for production use.
I run Postfix/Dovecot with Amavisd-new/SA/Clam on el5 and am more than happy with that setup, but there are many ways to skin this particular cat and much will depend on your own personal preference.
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