web400@xxxxxxxxxxxxxxxx wrote:
> So the question is, how do you find out what the mail exchangers are 
> called?   The answer is: you look up the MX records.

In addition, you can have more than one mail exchangers ... each with a
priority, so that if the first mail exchanger doesn't work, the sending
mail server will try the next, etc.

I've seen domains with dozens of mail exchangers (and, in some cases,
all of them down).

Backup MX's are good if your internet connection isn't the most robust
in the world, or if you receive a large amount of mail.  Mail servers
have a VERY low failure tolerance, so having a backup is often a good idea.

david

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