Questions about MX record
Mathias Körber
mathias at staff.singnet.com.sg
Sun Jul 23 07:21:03 UTC 2000
> -----Original Message-----
> From: news at news6.aus1.giganews.com
> [mailto:news at news6.aus1.giganews.com]On Behalf Of Nick McCubbins
>=20
> My understanding is that I should have two "A" entries, one for
> mail.domain.com and one for domain.com, both pointing to the machine's
> IP address.
You don't need two A records.
The cleaner way is to:
@ IN SOA ...
IN NS ns1
IN NS <other nameserver elsewhere>
IN MX mail
mail IN A 1.2.3.4
ns1 IN A 1.2.3.4
If you want all mail to potential hosts or subdomains
of your domain to also go to mail.domain.com, you could
a) add another wildcard MX record
* IN MX mail
b) add a separate MX record for each host and subdomain
host1 IN MX mail
The extra A record for domain.com is not really necessary,
and would most likely be used ifyou want web URLs like
http://domain.com
to work the same as http://www.domain.com. In that case, naturally
the A records for domain.com and www.domain.com must point to the same =
address.
It is not common to use an extra A record for mail, though it might
help with broken mailers that do not understand MX records...
HTH
>=20
> Should I set the mx record to domain.com or mail.domain.com? What
> effects will this have on my Sendmail configuration?
>=20
> Thanks in advance.
>=20
> -Nick
>=20
>=20
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