we are looking to implement SA in our environment this best describes
what we want to do.
[SPAM/HAM] --> [ SA GATEWAY] -----------------------------> [MS EXCHANGE]
- system wide filtering - all user mailboxes
- postfix transport - MX SEC RECORD
- MX PRI record
the question that was posed --- if the MS Exchange is not accessible (network
issue, down for maintenance) -- what happens to the email?
My best understanding is the email will be rejected as "mail-server not
available", as SA is a filter not an MTA and that Postfix is a check/forwarding
agent (not "store" & forward).
Would I be correct in assuming, in the event that if MS Exchange was down, in
order to "store" mail -- I would need to have a backup MTA with all the users
mailboxes replicated?
Thanks,
Tony
