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mLine 1,612:
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→Without a backup MX
* The sender's server resends the mail at a later date.
* The sender's server resends the mail at a later date.
''The requirement to re-queue is a fundamental part of the SMTP protocol -
''The requirement to re-queue is a fundamental part of the SMTP protocol - ''
it is not optional. So, if your server is '''offline''' due to a link or ISP
it is not optional. So, if your server is '''offline''' due to a link or ISP
outage, '''the mail just stays at the sender's server until you are once
outage, '''the mail just stays at the sender's server until you are once'''
again reachable'''.
again reachable'''.'''
===='''With''' a backup MX====
===='''With''' a backup MX====
