How do I configure postfix to deliver to multiple smtp relay hosts.
We have 2 internet connection on a WAN bonder, if 1 line goes down we'd like post fix to deliver to a secondary smtp relay host.
I have tried this
relayhost = smtp1.box.com and smtp2.box.xom
postfix: fatal: relayhost parameter setting must not contain multiple values: smtp.mweb.net smtp.vbmail.co.za
Is there an option to alternate for load balancing or at least for fail-over