On 12 Mar 2013 15:31, "Axel Luttgens" AxelLuttgens@swing.be wrote:

Le 12 mars 2013 à 14:43, Simon Brereton a écrit :

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Hi

[...]

Is there a command available that can list the connections per IP?

Hello Simon,

You could have a look at 'doveadm who' (

http://wiki2.dovecot.org/Tools/Doveadm/Who).

I really should get around to upgrading..

Simon

On 12 March 2013 16:59, Axel Luttgens AxelLuttgens@swing.be wrote:

Le 12 mars 2013 à 16:21, Simon Brereton a écrit :

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On 12 Mar 2013 15:31, "Axel Luttgens" wrote:

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[...] You could have a look at 'doveadm who' (http://wiki2.dovecot.org/Tools/Doveadm/Who).

I really should get around to upgrading..

:-)

Now, there are still the more generic ways, yet probably requiring a bit more guesswork; for example, assuming binary lsof is available on your system:

    sudo lsof -n -i :imap,pop3

Handy. Thanks. Of course it only works in the instant I get the message (which isn't always apparent from the client).

On the other hand, I don't remember exactly what happens when that mail_max_userip_connections limit is hit; doesn't Dovecot log some hint that would allow you to track the "culprit"?

Well, not that I could see - that's why I asked on the list :) That's not to say it isn't there, but all I see in the log is: Mar 12 13:47:12 mail dovecot: imap-login: Maximum number of connections from user+IP exceeded (mail_max_userip_connections): user=simon@example.net, method=PLAIN, rip=127.0.0.1, secured

I suppose this implies it's the webmail client., but even having that open on two different machines shouldn't open 10 connections. Should it?

Simon

On 12 March 2013 18:03, Axel Luttgens AxelLuttgens@swing.be wrote:

Le 12 mars 2013 à 17:18, Simon Brereton simon.buongiorno@gmail.com a écrit :

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[...]

I suppose this implies it's the webmail client.,

So, to be sure: the webmail server is running on the same box as the one running Dovecot?

Si. Yes.

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but even having that open on two different machines shouldn't open 10 connections. Should it?

I tended to believe that usually, a webmail application tends to open/close connections sequentially, or to consecutively select relevant mailboxes within a single connection. But who knows... Which webmail app have you installed?

I believe that as well, especially as I don't have tons of folders (some of my users do). I'm using Horde.

When connecting to/making use of the webmail, you should at least see connect/disconnect entries written in Dovecot's log. Do they tend to overlap?

With two machine and two phones, it's difficult to keep track of that

• but I will try. To avoid that I was hoping there was a way to print out in table form which connections for which user were from where. And so now I have another reason to upgrade. I need to fix the mess I made with postfix first though.

Simon