RAM for a Mail Server Server
Postfix, Dovecot, spam filtering and ClamAV virus scanning. That needs about 2.3 GB; a 4 GB plan leaves room to spare. Adjust it below.
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Operating System
Web Server
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Estimated use 2.3 GB, plus 25% headroom
Where It Goes
Linux300 MB
Database556 MB
Mail and ClamAV1.46 GB
VPS RAM Calculator
Memory for Mail Server
Linux300 MB
Database556 MB
Mail and ClamAV1.46 GB
Plan to Choose4 GB
Postfix, Dovecot, spam filtering and ClamAV virus scanning.
Figures are typical; check real use with free -h and htop after a week of normal traffic, and resize if the server swaps.
Questions
How much RAM does a mail server server need?
About 2.3 GB for the set-up described; choose 4 GB to leave headroom.
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