>What is the problem? Your gateway server forwards mail to the >mailbox server as usual, but then the mailbox server is "reset" to >some earlier checkpoint, causing all mail to be lost that was >delivered since that earlier checkpoint. The mail is no longer on >your gateway server, so there is no mail to replay. > >The proper solution is not to deliver that mail to the mailbox server.
I need to receive mail for that domain from various external clients during this period. Only me, so I can do it any way, doesn't need to be User convenient. >For example, turn off the mail software on the mailbox server before >making the checkpoint, or do something on the gateway server that >keeps it from sending mail to the mailbox server. I normally do this during maintenance windows with the defer_transports = hold statement. >Besides playing >games with defer_transports, you could use a firewall rule or >something else that prevents mail from traveling to the mailbox >server. 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? If I roll back the mailbox server during this period, delivering mail back into it would be most convenient. I don't want, but need mail delivery working and I cannot change DNS records for this, the window is to short and abrupt. I don't want to setup a new mailbox server and deliver there as that's more work, then I have to migrate that mail out and in. Thanks, jlc
