[Mimedefang] DNS and MX records
Alan Premselaar
alien at 12inch.com
Wed May 10 02:54:29 EDT 2006
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Kris Deugau wrote:
> netguy wrote:
>> Receintly I updated DNS for a few domains. My registrar gives the
>> option of assigning an IP addy for domain.tld without having an alias:
>> mail.domain.tld Ok, says I, lets give it a go. Bam! Slam, Spam
>> started invading my privacy. This leads me to believe either:
>> 1. Mail ( spam ) in this case is being sent to domain names without
>> doing MX lookups.
>
> Yep. Spamware will certainly blindly open a connection to port 25 on
> <domain.tld>, rather than sorting through MX records. Personally, I
> think it's "better" to have that A record in place, spam notwithstanding.
>
If I'm not mistaken, even properly configured MTAs will revert to the A
record of a domain of there are no MX records available. (although I
haven't done any real research to back up this statement recently so I
could be completely off base)
Alan
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.1 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iD8DBQFEYY4kE2gsBSKjZHQRAqDxAJ99cB20GY+mTVfDa1K0Pr6YDlxM3ACfUpHu
nJyzmBvCoPxmv6DE9TvXyE8=
=TpOS
-----END PGP SIGNATURE-----
More information about the MIMEDefang
mailing list