nanog mailing list archives

Re: Arrogant RBL list maintainers


From: Michael Holstein <michael.holstein () csuohio edu>
Date: Wed, 09 Dec 2009 14:48:28 -0500


One could argue that you are *not* complying by using a generic PTR
for a mail server. Some would say that a serious mail server should
have proper DNS records, others will say that you should accept mail
from any IP no matter what.

No, we do have it correct .. they wanted us to fix all the *other* ones
(that can't even send mail because they're firewalled from doing so) ..

$ dig -t mx csuohio.edu
[..]
;; ANSWER SECTION:
csuohio.edu.        10800    IN    MX    10 antispam5.csuohio.edu.
csuohio.edu.        10800    IN    MX    10 antispam4.csuohio.edu.
csuohio.edu.        10800    IN    MX    10 antispam3.csuohio.edu.
csuohio.edu.        10800    IN    MX    10 antispam2.csuohio.edu.
[..]
;; ADDITIONAL SECTION:
antispam5.csuohio.edu.    10800    IN    A    137.148.19.13
antispam4.csuohio.edu.    10800    IN    A    137.148.18.13
antispam3.csuohio.edu.    10800    IN    A    137.148.18.21
antispam2.csuohio.edu.    10800    IN    A    137.148.19.12

(and)

13.19.148.137.in-addr.arpa domain name pointer antispam5.csuohio.edu.
13.18.148.137.in-addr.arpa domain name pointer antispam4.csuohio.edu.
21.18.148.137.in-addr.arpa domain name pointer antispam3.csuohio.edu.
12.19.148.137.in-addr.arpa domain name pointer antispam2.csuohio.edu.

Cheers,

Michael Holstein
Cleveland State University



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