> -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of Rob Kampen > Sent: Tuesday, April 09, 2013 7:35 PM > To: CentOS mailing list > Subject: Re: [CentOS] Strange Postfix problem > > On 04/10/2013 03:58 AM, tdukes at palmettoshopper.com wrote: > > Hello, > > > > Was trying to setup postfix on my home PC. Running Centos > 6.4. I don't > > have a static IP and use zoneedit and ddclient to keep my > installation > > of zoneminder current. > > > > So I decided I wanted to get zoneminder to send me email > alerts. Sent > > some test messages but none were sent. > > > > I went to webdnstools website thinking maybe there is a dns > or network > > problem. > > > > When it checks my dns setup, everything is fine except the > mail server > > is has the wrong IP address. The A record and the www A record have > > the correct IP. The IP address its reporting is one that > belongs to my ISP. > sounds like your ISP only allows certain services through and > intercepts the rest as you do not have a fixed IP. > may want to talk to them as they control the DNS and reverse > DNS, both of which should be correct for email servers to > function correctly. > Basically, to do an email server you need a fixed IP. I kind of suspected that. However, if I go to yougetsignal, port forwarding tester and check ports 25 and 110 for my domain, the ports are open. If I do mail.domain.com, the port is closed. It sounds as though they are intercepting requests on those ports. Thanks!!