-----Original Message----- If necessary I am willing to implement a new mail server and a new backup mx.
What I would like to know is what solution you guys would recommend for the mail server and the backup MX?
Any pointers would be greatly appreciated.
Running a backup or secondary MX at this point is largely a waste of time. The only thing a backup MX gets you is an increase in spam.
Most MTAs will retry sending every couple of hours. So if your MX is down for a while, it's not really a big issue.
I run a cluster of sendmail servers (at MX 0) with spamassassin and clamav, and it works quite well. Provides redundnacy and scalability, without the nonsense of a backup mx.
The last "backup" MX I ran was probably retired at least two years ago, and even then it was well past pointless and irrelevant.
Cheers,
Dan