RRs for mail server
Jukka Salmi
jukka-usenet at 2003.salmi.ch
Tue Sep 2 21:41:05 UTC 2003
I'm setting up resource records for a mail server. So far I have:
[...]
example. IN MX mail.example.
foo.example. IN A 1.2.3.4
mail.example. IN A 1.2.3.4
[...]
4.3.2.1.in-addr.arpa IN PTR foo.example.
[...]
The mail server uses mail.example as HELO hostname when sending mail.
I'm not sure if this is a valid setup, because if the remote mail server
does a reverse lookup for mail.example and then looks up the A record
for the address it got, he will get foo.example (and not mail.example
as used in HELO). If this is a problem I should probably change the MX
record to
example. IN MX foo.example.
Any comments are appreciated!
TIA, Jukka
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