[CentOS] dovecot disconnect(s) / new facts

Tue Dec 12 15:42:06 UTC 2006
Alex Palenschat <alex at nssmgmt.com>


> -----Original Message-----
> From: centos-bounces at centos.org 
> [mailto:centos-bounces at centos.org] On Behalf Of Michael Kress
> Sent: Monday, December 11, 2006 5:49 PM
> To: CentOS mailing list
> Subject: [CentOS] dovecot disconnect(s) / new facts
> 
> 
> Hi,
> 
> I just tried the below with the current version 1.0 RC15 (from the 
> dovecot website) and I still got the Problem:
> telnet gives me the following output:
> -----8<-----8<-----8<-----SNIP-----8<-----8<-----8<-----
> +OK dovecot ready.u-ERR invalid command u
> s-ERR invalid command s
> e-ERR invalid command e
> r-ERR invalid command r
> -ERR invalid command
> u-ERR invalid command u
> s-ERR invalid command s
> e-ERR invalid command e
> r-ERR invalid command r
> _-ERR invalid command _
> 1-ERR invalid command 1
> 
> -ERR invalid command
> -----8<-----8<-----8<-----SNIP-----8<-----8<-----8<-----
> 
> The above output results from the following entry: user user_1[ENTER]
> 
> So now I know that this is no version issue.
> Can you tell me something on how I can find the solution for this 
> problem? I don't think its a firewall issue, I disabled my Desktop 
> Firewall. On the server I use shorewall, but of course, port 
> 110 is open 
> and it works disabling AntiVir on the client side. The error 
> also occurs 
> when I disable the Server Firewall as well. The error is 
> reproducible on 
> several PCs (I tried 3 PCs).
> Have you got any hint? Without solving the problem, I have to 
> switch the 
> pop3 server to another one, because this problem is really a crucial 
> one.The only problem is: I like dovecot. :)  Moreover I'd 
> like to keep 
> dovecot updatable.
> 
> Thanks in advance!
> Regards,
> Michael
> 
> -------- Original-Nachricht --------
> Betreff: 	[CentOS] dovecot disconnect(s)
> Datum: 	Wed, 06 Dec 2006 00:29:21 +0100
> Von: 	Michael Kress <kress at hal.saar.de>
> Antwort an: 	CentOS mailing list <centos at centos.org>
> An: 	CentOS mailing list <centos at centos.org>
> 
> 
> 
> Hi, I've got a problem with dovecot regarding a pop3 proxy 
> issue. When I configure a dovecot server to do just plain 
> pop3 I can telnet from a windows box without any flaw, but as 
> soon as the client uses some pop3 proxy (for example outlook 
> uses avira antivir Mail-AntiVirus Protection), queries to 
> that server fail. A log line looks like this:
> 
> pop3-login: Dec 05 22:53:24 Info: Disconnected [::ffff:84.165.54.42]
> 
> Moreover with the proxy activated, a telnet to port 110 
> (pop3) is not working properly, the cursor stays right behind 
> "+OK dovecot ready." and as soon as I enter a character, the 
> server rejects this character as an unknown command. As soon 
> as I turn off the Antivir-Proxy the telnet to port 110 runs 
> flawlessly and I can login. Is there any fix for that? Or did 
> I misunderstand something? TIA for any hint
> 
> Regards,
> Michael


Is there any update for Antivir on the Windows side? It looks like it is
mangling your pop3 commands. 

alex