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Thread: ISP blocking port 25???

  1. #1
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    Default ISP blocking port 25!!!

    After 2 somewhat successful years of using zimbra, my isp decided to block port 25 on my connection. Is there a way around this? If so, please point me in the right direction.

    Thanks,

    Storm
    Last edited by stormchas3r; 08-08-2007 at 10:16 AM.

  2. #2
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    One solution would be to rent a virtual server somewhere and run a Zimbra MTA server there. I don't have enough experience with the virtual host providers to recommend one over another, but I've seen that they are relatively inexpensive.

  3. #3
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by stormchas3r View Post
    After 2 somewhat successful years of using zimbra, my isp decided to block port 25 on my connection. Is there a way around this? If so, please point me in the right direction.

    Thanks,

    Storm
    Do you mean Inbound, Outbound or both? If it's Outbound then relay through their servers. If it's inbound then use a service such as the one from dyndns.org that will forward mail to an alternate port on your Zimbra server (details in the forums/wiki on how to change the port). Obviously if it's both then dyndns.org also have a relay facility for Outbound mail (I believe), there are other suppliers of such services.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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    Yes, inbound and outbound. I looked at dyndns and I guess if I want it working, I will need to drop $40 on it.

    Thanks, for the advice.

  5. #5
    phoenix is offline Zimbra Consultant & Moderator
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    I don't think anyone provides that service for free but do search around, as I said, there's other providers that do it.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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    I just ran into this issue and found a solution that worked. I edited the /opt/zimbra/postfix/conf/master.cf fileand uncommented the following line:

    #submission inet n - n - - smtpd

    then retart the smtp server

    This tells the zimbra server to listen on port 587 (Authenticated smtp) and it worked fine here.

    Dan

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    Complain and find another ISP

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    Quote Originally Posted by jholder View Post
    Complain and find another ISP
    Oh, how I would LOVE to find a better ISP than Comcast!

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    Yeah... I use Comcast at home as well, and I've been using No-Ip's Mail Reflector. I actually started using Mail Reflector when I was living in an area that was provided by Opt. Online. I just haven't dropped the service since because:
    1) It works.. Quite well....
    2) It provides me with a backup storage of email if/when my own server is down (like most recently when I lost an HD and had to recover from a backup).

    It costs $40 a year though. That's the only downside to it.

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    Quote Originally Posted by dlevack View Post
    I just ran into this issue and found a solution that worked. I edited the /opt/zimbra/postfix/conf/master.cf fileand uncommented the following line:

    #submission inet n - n - - smtpd

    then retart the smtp server

    This tells the zimbra server to listen on port 587 (Authenticated smtp) and it worked fine here.

    Dan
    Perfect. Exactly what I needed. I wonder where the right place is to put this on the wiki.
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