Strange Postfix Problem

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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.

TIA

5 thoughts on - Strange Postfix Problem

  • This is a multi-part message in MIME format.
    ————–010308020607040903090406
    Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable

    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.

    ————–010308020607040903090406

  • Consider setting up Postfix to auth (with your ISP email credentials) and send mail through your ISP’s mail server. I’ve seen write-ups for using Gmail in the same way. http://www.cyberciti.biz/faq/postfix-smtp-authentication-for-mail-servers/

    Not a bad idea, but if he’s in a dynamic pool the ISP is unlikely to help him out. Does he really need a static?

    Do you need to receive mail or just send it?
    See the URL above if you just need to send.

  • This is a multi-part message in MIME format.
    ————–070504010803050507080508
    Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable

    This effectively shields your email server from the internet – all mail will appear to come from the ISP’s mail IP and thus your dynamic IP will not matter. reception of mail will be by whomever the MX record points to – a fixed IP. you will probably need to use a mail client to retrieve mail from the ISP provided IMAP server.

    ————–070504010803050507080508

  • 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!!

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