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Friday, February 4. 2011

1and1 Blocking Port 25

After a bit of frustration at Joomla! for discarding important error information, and phpMailer for not providing a method of retaining that error information, I have discovered that my client's web host, 1and1, blocks outbound connections on port 25 to all hosts except smtp.1and1.com. This wouldn't be a significant problem if I hadn't setup SPF on their domain.... Looks like it is time to open up an alternate port on the mail server....

Update: 1and1 is blocking ports 465 and 587 in addition to port 25. Great....

Posted by Kevin Locke in System Administration at 12:26 | Comments (2)

Comments

Just encountered same problem with port 25 blocked, did you manage to use a port other than 25, 465 or 587? Presumably a higher random port number would be open?
#1 A Woods (Homepage) on 2011-10-03 07:59
Right, 25, 465, and 587 are blocked. I could have setup my client's mail server to listen on another high-numbered port and connected to that (1&1 doesn't appear to be blocking most/all outbound ports), but I didn't. I found 1&1's service to be unacceptable, for this reason and several others, as did the client. So we canceled it and setup hosting elsewhere.
#1.1 Kevin Locke on 2011-10-03 08:21
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