dovecot - Jun 2015 - help with t/s retrieval 'hangs' disconnect for inactivity

I have Dovecot 2.1.17 on Centos, all working well

since yesterday one user complaining he can not retrieve emails, TBird
mail client says like '1 of 9' and, doesn't go any further.

that's on several of his PCs using TBird, on a LAN behind f/wall, quite
physically remote to server, server in Sydney, remote client is SEAsia

looking at logs I see emails access, looking at server Maildir , new
emails get moved from 'new' to 'cur'

what else can I do from server end ?
what else should be done from user end ?

Jun 19 11:28:31 pop3(it at aaaa.com.au): Info: Disconnected for inactivity in
reading our output top=0/0, retr=1/0, del=0/56, size=6562805
Jun 19 11:29:20 pop3(it at aaa.com.au): Info: Connection closed top=0/0,
retr=1/0, del=0/56, size=6562805

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Hash: SHA1

On Fri, 19 Jun 2015, voytek at sbt.net.au wrote:
> since yesterday one user complaining he can not retrieve emails, TBird
> mail client says like '1 of 9' and, doesn't go any further.
>
> that's on several of his PCs using TBird, on a LAN behind f/wall, quite
> physically remote to server, server in Sydney, remote client is SEAsia
>
> looking at logs I see emails access, looking at server Maildir , new
> emails get moved from 'new' to 'cur'
>
> what else can I do from server end ?
> what else should be done from user end ?
>
> Jun 19 11:28:31 pop3(it at aaaa.com.au): Info: Disconnected for inactivity
in
> reading our output top=0/0, retr=1/0, del=0/56, size=6562805
> Jun 19 11:29:20 pop3(it at aaa.com.au): Info: Connection closed top=0/0,
> retr=1/0, del=0/56, size=6562805
verify that the TCP connection is working using wireshark or similiar 
tool. Maybe a firewall on your side cuts the connection?

- -- 
Steffen Kaiser
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On Fri, June 19, 2015 5:02 pm, Steffen Kaiser wrote:
>>
>> Jun 19 11:28:31 pop3(it at aaaa.com.au): Info: Disconnected for
inactivity
>> in reading our output top=0/0, retr=1/0, del=0/56, size=6562805 Jun 19
>> 11:29:20 pop3(it at aaa.com.au): Info: Connection closed top=0/0,
>> retr=1/0, del=0/56, size=6562805
>
> verify that the TCP connection is working using wireshark or similiar
> tool. Maybe a firewall on your side cuts the connection?
>
Steffen, thanks.

it seems it was some issue with "abnormal long time reponse from some Thai
gateways", as reported back by o/s user

is there some system where such issues are reported ? I vaguely recall
being shown something like that in the past?

My guess would be some crazy formated email that is causing that.
Login via webmail/other email client and manage those new emails,
> -----Original Message-----
> From: dovecot [mailto:dovecot-bounces at dovecot.org] On Behalf Of
> voytek at sbt.net.au
> Sent: sexta-feira, 19 de Junho de 2015 02:45
> To: dovecot at dovecot.org
> Subject: help with t/s retrieval 'hangs' disconnect for inactivity
> 
> I have Dovecot 2.1.17 on Centos, all working well
> 
> since yesterday one user complaining he can not retrieve emails, TBird
> mail client says like '1 of 9' and, doesn't go any further.
> 
> that's on several of his PCs using TBird, on a LAN behind f/wall, quite
> physically remote to server, server in Sydney, remote client is SEAsia
> 
> looking at logs I see emails access, looking at server Maildir , new
> emails get moved from 'new' to 'cur'
> 
> what else can I do from server end ?
> what else should be done from user end ?
> 
> Jun 19 11:28:31 pop3(it at aaaa.com.au): Info: Disconnected for inactivity
> in reading our output top=0/0, retr=1/0, del=0/56, size=6562805 Jun 19
> 11:29:20 pop3(it at aaa.com.au): Info: Connection closed top=0/0,
> retr=1/0, del=0/56, size=6562805