ISP blocking port 25!!!

stormchas3r · Post by **stormchas3r** » Wed Aug 08, 2007 10:58 am

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

1230zaf · Post by **1230zaf** » Wed Aug 08, 2007 11:25 am

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.

phoenix · Post by **phoenix** » Wed Aug 08, 2007 11:43 am

[quote user="stormchas3r"]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[/QUOTE]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.

stormchas3r · Post by **stormchas3r** » Wed Aug 08, 2007 12:11 pm

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.

phoenix · Post by **phoenix** » Wed Aug 08, 2007 12:21 pm

I don't think anyone provides that service for free but do search around, as I said, there's other providers that do it.

dlevack · Post by **dlevack** » Mon Aug 13, 2007 5:22 pm

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

jholder · Post by **jholder** » Mon Aug 13, 2007 9:30 pm

Complain and find another ISP

k7sle · Post by **k7sle** » Mon Aug 18, 2008 2:50 am

[quote user="jholder"]Complain and find another ISP

[/QUOTE]
Oh, how I would LOVE to find a better ISP than Comcast!

omegainstitute · Post by **omegainstitute** » Mon Aug 18, 2008 8:13 am

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.

Baylink · Post by **Baylink** » Fri Sep 19, 2008 11:42 am

[quote user="dlevack"]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[/QUOTE]
Perfect. Exactly what I needed. I wonder where the right place is to put this on the wiki.