-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@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@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!!