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Joseph L. Casale:
> Ok, so I can stop mail at the firewall. When I apply for an SSL cert on the
> weekend and the SSL company uses the WHOIS DB to send a confirmation
> email to me, how do I get my cert _this weekend_ to have that stage of
> my maintenance completed? The conf mail will have bounced?
The idea is that you ***QUEUE*** the mail for the mailbox server
on the gateway. The default postfix maximal_queue_lifetime setting
of five days should be sufficient to survive a weekend outage of
the mailbox server.
> If I roll back the mailbox server during this period, delivering
> mail back into it would be most convenient.
1) If you don't ***QUEUE*** the mail on the gateway, there is
nothing to replay, because the mail is already delivered to the
2) If you do ***QUEUE*** the mail on the gateway, then all you need
to do is turn on the flow to the mailbox server when you're done,
and Postfix will deliver it to the mailbox server.