I am seeing the following in my logs: Apr 26 10:18:43 mailhost postfix/smtpd[46627]: connect from unknown[98.118.152.26]
However, the IP does resolve: mailhost # host 98.118.152.26 26.152.118.98.in-addr.arpa domain name pointer onlinecourseevaluations.com. mailhost # host onlinecourseevaluations.com onlinecourseevaluations.com has address 98.118.152.28 onlinecourseevaluations.com mail is handled by 10 aspmx4.googlemail.com. onlinecourseevaluations.com mail is handled by 10 aspmx5.googlemail.com. onlinecourseevaluations.com mail is handled by 2 aspmx.l.google.com. onlinecourseevaluations.com mail is handled by 5 alt1.aspmx.l.google.com. onlinecourseevaluations.com mail is handled by 5 alt2.aspmx.l.google.com. onlinecourseevaluations.com mail is handled by 10 aspmx2.googlemail.com. onlinecourseevaluations.com mail is handled by 10 aspmx3.googlemail.com. Why isn't postfix using the hostname returned by the reverse DNS lookup? Is it because the forward and reverse DNS do not match? I thought I've seen cases where forward and reverse did not match but it still showed a hostname for the client. I've checked google and the mailing list archives, and none of the things I saw apply here. I am not in a chroot environment, and I am running a local caching DNS server. This is happening across a cluster of 5 servers, and the load is fine on all the servers. Other clients are resolving as expected. Thanks for your input, Dan
