Setup a backup MX

[sirioxx]

Hi, I have a mailserver which is available from 2 ip addresses (adsl + adsl backup) outside of the office.

The office lan has zeroshell like gateway and dns.
There is a specific domain for which I have to use the smtp and smtpbkp.

I created two a record
smtp.mydomain.com 1.1.1.1
smtpbkp.mydomain.com 2.2.2.2

And a record MX
mydomain.com MX smtp.mydomain.com (priority 30).

I can’t create a second MX record
mydomain.com MX smtpbkp.mydomain.com (priority 10).
because I get ‘ERROR: ldap_add: Already exists (68) ‘.

Is it wrong what I’m trying to do, or is wrong the way I’m doing it?

Thank you.

[Author]

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