i get the following warning from the relay log; this happens when this client connect to my relay; always i get this
Jul 15 17:06:07 relay1 postfix/qmgr[3664]: 5CA7F16135E: from=<a...@foo.com>, size=483945, nrcpt=2 (queue active) Jul 15 17:13:59 relay1 postfix/smtpd[16344]: warning: 192.168.2.35: address not listed for hostname smtp.foo.com Jul 15 17:28:11 relay1 postfix/smtpd[15893]: warning: 192.168.2.35: address not listed for hostname smtp.foo.com Jul 15 17:31:06 relay1 postfix/smtpd[16490]: warning: 192.168.2.35: address not listed for hostname smtp.foo.com Jul 15 17:31:40 relay1 postfix/smtpd[16345]: warning: 192.168.2.35: address not listed for hostname smtp.foo.com what could be causing this warning?