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Thread: My ISP blocks incoming port 25 connections what can i do?

  1. #1
    Join Date
    Aug 2006
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    3
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    Ubuntu 7.10 Gutsy Gibbon

    My ISP blocks incoming port 25 connections what can i do?

    I'm trying to setup a mail server in my dorm room. I am able to send messages to people but I cannot get any messages to get back to me. When I try to telnet into port 25 from outside my network it cant connect. I tried changing smtp to listen at 587... same thing. Do you guys have any other ideas?

  2. #2
    Join Date
    Nov 2006
    Location
    Pennsylvania
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    Re: My ISP blocks incoming port 25 connections what can i do?

    ask ISP to allow incoming connections on port 25 is all I can think of.
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  3. #3
    Join Date
    Aug 2008
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    18

    Re: My ISP blocks incoming port 25 connections what can i do?

    I have problems at times sending mail from my server using my email client. I have to use my ISP's smtp settings to send.

    If you have a email account with your school try using their pop3

  4. #4
    Join Date
    Aug 2006
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    Re: My ISP blocks incoming port 25 connections what can i do?

    Well I don't think asking them to open the port for me would get anywhere. They just switched the resnet to using dynamic ips. So their network is a little funky right now. Last year we had static ones. I can get messages out fine. Using my school's pop isn't as fun. I want to be able to use my own domain for my mail address. Also I had some projects in mind that would need mail receiving to work.
    Last edited by crhossen; September 2nd, 2008 at 03:06 AM.

  5. #5
    Join Date
    Mar 2008
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    54
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Re: My ISP blocks incoming port 25 connections what can i do?

    Upgrade to a static IP level of service. That's why they cost more...

  6. #6
    Join Date
    Nov 2006
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    49

    Re: My ISP blocks incoming port 25 connections what can i do?

    You could use a service like DynDNS to forward e-mail to an alternate port: http://www.dyndns.com/services/mailhop/relay.html

    I would need to do the same thing with my provider (all incoming ports under 8000 are closed.)

  7. #7
    Join Date
    Aug 2006
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    Ubuntu 7.10 Gutsy Gibbon

    Re: My ISP blocks incoming port 25 connections what can i do?

    Quote Originally Posted by schettj View Post
    Upgrade to a static IP level of service. That's why they cost more...
    We used to get Static IPs last year. But now they are running out of IPs at my school (RIT) so they switched the Resnet to dynamic. The dyndns mailhop is kinda pricey. I'm trying to find a free way to do it.

  8. #8
    Join Date
    May 2007
    Location
    Phoenix, Arizona USA
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    2,909
    Distro
    Ubuntu 8.04 Hardy Heron

    Re: My ISP blocks incoming port 25 connections what can i do?

    As was mentioned you could switch to a commercial account (they aren't that much more).

    no-ip has a special service for this also. It's called relector.

    http://www.no-ip.com/services/manage...5_unblock.html

    -Tim
    www.pcchopshop.net

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