port 587

[BarrySDCA]

doez zimbra smtp listen on port 25 *AND* 587? thank you

[KevinH]

Just 25 as I recall.

[marcmac]

That's this bug: http://bugzilla.zimbra.com/show_bug.cgi?id=5194

We've pretty much decided to punt on it, unless it gets lots of votes (ahem). There's a note in the bug on how to enable it.

[BarrySDCA]

that's really too bad. We can't go forward w/out port 587 working. More and more customers can't reach us through port 25 due to isp port filtering.

[marcmac]

Um - did you read the bug? The change to make port 587 work is pretty simple.

[BarrySDCA]

you know I saw that 5 min after I posted and I figured 'someone is going to think I'm stupid' LOL thank you

[useopenid]

These days 587 is a requirement; we *try* to push customers to 465/ssl, but there are still a lot of broken mail clients out there...

[raj]

changes to postfix config may not carry over after "Zimbra Upgrades"..please keep config backup so you can re-apply again.
* many times my postfix remain un-changed even after "Zimbra Upgrades", keeping copy helps anyway

Raj

[phoenix]

These days 587 is a requirement; we *try* to push customers to 465/ssl, but there are still a lot of broken mail clients out there...

Yes but port 587 is the correct Submission port (465 is not correct and has been deprecated) for clients to submit mail, it's not the port for connecting SMTP servers. The original question was about 'listening' on port 25 & 587,. If the o/p wanted to receive mail on port 587 because their port 25 was blocked then that would be incorrect and they should use a mailhop service that rerouted mail to another port. If the problem is that other mail servers are blocked from sending on port 25 then those servers should relay through their ISPs mail servers - that should only happen on residential type IP addresses, a business ISP service should not be blocking port 25.

[dreamgear]

I have no argument with your points, but I *do* block port 25 on my business network (egress filtering) in an attempt to thwart and detect spam-sending malware. I have rules that allow connects only to certain hosts on port 25. If your zimbra host was outside your firewall, and you did egress filtering, and you used smtp clients, you'd need to add such a rule.