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List:       postfix-users
Subject:    Re: timeout after DATA ( 0 bytes )
From:       Giuseppe De Nicolo' <g.denicolo () itdep ! oapointroma ! org>
Date:       2014-09-25 14:07:14
Message-ID: 54242192.8090207 () itdep ! oapointroma ! org
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On 09/18/2014 05:40 PM, Wietse Venema wrote:
> Giuseppe De Nicolo':
>
>> 136.233724      212.19.117.109  217.72.32.234   SMTP    131     S:
>> 	250 2.1.0 Ok | 250 2.1.5 Ok | 354 End data with <CR><LF>.<CR><LF>
>> 136.441076      212.19.117.109  217.72.32.234   SMTP    131     [TCP
>> 	Retransmission] S: 250 2.1.0 Ok | 250 2.1.5 Ok | 354 End data with
>> 	<CR><LF>.<CR><LF>
>> 136.468072      212.19.117.109  217.72.32.234   SMTP    131     [TCP
>> 	Retransmission] S: 250 2.1.0 Ok | 250 2.1.5 Ok | 354 End data with
>> 	<CR><LF>.<CR><LF>
>> ..SNIP...
>> 377.007113      212.19.117.109  217.72.32.234   SMTP    131     [TCP
>> 	Retransmission] S: 250 2.1.0 Ok | 250 2.1.5 Ok | 354 End data with
>> 	<CR><LF>.<CR><LF>
>> 436.284965      212.19.117.109  217.72.32.234   SMTP    122     S:
>> 	421 4.4.2 smtp.oapointgroup.it Error: timeout exceeded
> Somewhere between sender and receiver is a network with a smaller
> MTU, and the sender is not receiving the ICMP "fragmentation needed"
> messages.  Only small packets are coming through.
>
> 	Wietse
>
Just to give a follow up the problem was resolved on their part using a 
mangle firewall rule to clear the DF bit or so they say , anyway my 
problem is solved

Thanks
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