Justin Piszcz wrote, at 08/08/2008 07:53 AM:
On the server w/ postfix:
$ host 38.119.56.160
160.56.119.38.in-addr.arpa domain name pointer
mta700.testemail.newegg.com.
160.56.119.38.in-addr.arpa domain name pointer mta700.email.newegg.com.
When it re-connected (after greylisting, then it works, what's going on)?
Aug 8 07:46:30 l1 postfix/smtpd[10502]: connect from
mta700.email.newegg.com[38.119.56.160]
Multiple PTR records tend to be returned in a round robin fashion:
$ host 38.119.56.160
160.56.119.38.in-addr.arpa domain name pointer mta700.testemail.newegg.com.
160.56.119.38.in-addr.arpa domain name pointer mta700.email.newegg.com.
$ host 38.119.56.160
160.56.119.38.in-addr.arpa domain name pointer mta700.email.newegg.com.
160.56.119.38.in-addr.arpa domain name pointer mta700.testemail.newegg.com.
