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