mail backup, something to discuss
I was thinking to setup some robust mailserver setup, after searching here and there i read this at ZoneEdit website:
Originally Posted by
http://www.zoneedit.com/doc/faq.html#mx2
When you sign up for the backup mail service, we automatically add our backup mail server in an MX record to your zone. This causes all incoming mail to attempt your primary server first, and if that fails, to try our backup server. When our backup server gets mail for you, it looks up your primary server, and periodically attempts to redeliver your mail to the primary. It will attempt redelivery for 10 days before returning the mail to the sender as undeliverable.
what i know if you setup dual MX records if the lower MX value fails to accept emails it would be delivered to the higher MX and if it fails it would go to higher and so on, how would they STORE it and then re-deliver it to the primary(lower) MX mailserver?
would it be DNS related? (which i doubt) or server side related? if its a server side how would the setup be?
i can't imagen running full server with all number of mailboxes for ALL users on the backup server and whenever the primary mx comes line they forward them or so.
because if you think about it, what about if the email was sent to WRONG email address and primary mx was down it will store it too and forward it when MX is back online?
kinda confusing
Please share your thoughts.
