loadbalancing MX records

hermann.strassner at hama.de hermann.strassner at hama.de
Thu Aug 31 11:25:44 UTC 2000


With your kind of load balancing it is up to the MTA to decide
which mail server to use=2E The remote MTA is normally not
under your control, so you have no influence on load balancing=2E

With the former kind of load balancing it is up to the name
server to decide which ip address to give, so which mail server
to use, and the name server for a zone is normally under the
same control as the mail servers=2E

You should install a mail relay with lower priority for security
and backup purposes=2E

Hermann

>I'm curious about this form of loadbalancing for
>mail (MX):

>;; ANSWERS:
>tsai=2Ees=2E        115493  MX      100 mail=2Einfomail=2Etsai=2Ees=2E
>
>;; ADDITIONAL RECORDS:
>mail=2Einfomail=2Etsai=2Ees=2E  106522  A       194=2E224=2E53=2E134
>mail=2Einfomail=2Etsai=2Ees=2E  106522  A       194=2E224=2E53=2E135
>mail=2Einfomail=2Etsai=2Ees=2E  106522  A       194=2E224=2E53=2E142
>mail=2Einfomail=2Etsai=2Ees=2E  106522  A       195=2E235=2E39=2E6
>
>if any "mail=2Einfomail=2Etsai=2Ees" host fail the message
>will be lost?
>
>is not better multiple MX definitions with equal preference?



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