Jay Lee wrote:
Traditional Mail Server Configuration has always taught that it's a
good idea to have a Backup MX Server configured for your domain so
that if your SMTP Server or subnet were to go down, mail for your
domain could still be received.
From a time when a good number of internet links were not always-on. It
made a lot of sense to get mail closer to you, even if you were not
available to receive it.
So here's my question, would it be risky to drop the backup MX
completely?
No
We're on a T1 that has been extremely reliable the past
few years. Should we have an outage, we'd have 4 hours I believe
until most mailservers would start generating delayed delivery
messages back to remote senders
Entirely dependant on the servers, but sendmail defaults to 4 hours.
Given the great unwashed's current expectations, this should be dropped
to half an hour or less
and 4 days before most mail servers
would give up on delivering a message (in which case we'd have time
to update the DNS most likely).
Our domain hosts about 1500 accounts,
how are your backups? how quickly and reliably could you set up a new
mailserver AND user accounts?
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