Hello list, In the moment our mailtraffic is handled by four mailgateways which are reachable through one round-robin dns-mx record. Each gateway runs postfix, amavisd, spamassassin and clamav. The four gateways handle 2.8 millions connections a day. My employee likes to replace the gateways with some new machines, but we are not sure how we should organise the new servers. That's why I'm asking here, I hope to profit from your experiences.
I can think of the following cases: 1) Run 2 servers with postfix only, which passing the message to 2 to 4 servers which run amavisd, spamassassin, clamav. Advantage: Easy to extend to handle more load, no problem with loadbalancing the postfix servers Disadvantage: overkill, you need 6 server to process the same max. load as in the present setup with 4 servers. 2) Run 2 servers with postfix, amavisd, spamassassin, clamav and 2 servers with only amavisd, spamassassin and clamav. Postfix will pass the messages to one of the four amavisd servers. Advantage: no problem with loadbalancing the postfix servers, best usage of resources (I guess) Disadvantage: hard to loadbalancing the amavisd server/processes. 3) Keep the actual server organisation: 4 servers with postfix, amavisd, spamassassin, clamav. Advantage: Known configuration, easy to extend Disadvantage: problem with loadbalancing I like to hear some comments, especially if someone know other possibilities to organize the servers and has maybe also some experiences to tell. Thanks for your patience with these offtopic topic (and my bad English). Greetings Stefan
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