We've been running zimbra in a split domain for a while with zimbra acting as the secondary system. We added another upstream mta and we tried adding it as a second "Relay MTA for external delivery" through the zimbra admin console. This updated the postfix relayhost to have two MTAs....which caused postfix to error out with the following:
Oct 25 08:51:40 zimbrahost postfix/trivial-rewrite: fatal: relayhost parameter setting must not contain multiple values: mta1.domain.com:25 mta2.domain.com:25
Oct 25 08:51:41 zimbrahost postfix/master: warning: process /opt/zimbra/postfix/libexec/trivial-rewrite pid 2409 exit status 1
Oct 25 08:51:41 zimbrahost postfix/master: warning: /opt/zimbra/postfix/libexec/trivial-rewrite: bad command startup -- throttling
Anyone know if I did something wrong or am I running into a bug?