We are currently looking to upgrade our mail server. Lately the processing of the CPU has causing the SMTP to be working real slow, causing a lot of timeouts. We currently we are running a P3 1.133GHz with 512MB RAM. We are looking to upgrade to a dual processor.
I was wondering if anybody was willing to share what type of server hardware they are using and if anybody had any recommendations on the CPU power and RAM to have optimal performance.
I had this same problem about 2 months ago, and asked a similar question to this list. The advice I personally liked best, and the advice that I took, was to build an inexpensive gateway box to deny the spam before it got to my mailbox server. We bought 2 fairly inexpensive Compaq rack servers, about $2300 a piece, and we are deny a good portion of mail at those boxes before they ever make it to our mailbox server. None of our servers are taxed at all anymore. Our current mailbox server is a dual 900 MHz machine with 1.5 GB of RAM, the spool partition is on a mirrored 15k rpm hardware raid card with 128MB of on-board cache, separate from our mailbox and app directory. We process about 200,000 emails a day. This machine was badly taxed. We added the two 2.04 GHz with 512 MB of memory in front of this one, and now nobody is working up a sweet!! This set up works great for us. Just as a side note, our gateway servers are running FreeBSD/postfix/spamassasin/clamav, but it could just as easily run win2k/imail/declude/sniffer.
-Russ
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