Personally I'd just drop the secondary mx completely and let the sending smtp server queue the mail whenever you're offline. Makes life a lot simpler.
I agree. That's why I started with "IF you have a secondary..." :)
trust me, I also agree 100%, but users on sourceforge and other mailing lists suffer if a mx is down for maintenance. If several messages are being delivered as in the case of busy lists like Fedora/asterisk/freeswitch, the bounce level goes through the roof too quickly. In *all* other cases, the RFC correct functioning servers don't even hiccup.
How do I keep users on sf lists from getting put on hold?
Thanks! jlc