did you try telnetting manually to the smtp server, or use another
client ? maybe some antivirus stuff involved ?

AG> Dod wrote:
>> Hello Arno,
>> 
>> I see in the log that there is 5 seconds delay between DATA and the
>> 10054 error. This may be interesting.

AG> No, the delay is 2 minutes and 5 seconds.
AG> One thing I can imagine is a problem with MTU Discovery,
AG> since small packets (SMTP command/response) go thru,
AG> may be the required ICMP packets are filtered?
AG> Does someone know what has to be configured to ensure MTU Discovery
AG> will not fail?

AG> --
AG> Arno Garrels
  

 
>> During  this  delay  do you send data ? I say this because some server
>> will  close cnx if no data transmitted fast enought and do not receive
>> data for xx seconds, usually the timeout is between 1 or 3 minutes but
>> I know a server that wait only 3 seconds (may be bad configuration).
>> 
>> The  best  is  to ask client to manualy telnet port 25 into the server
>> and  type  a  SMTP  sequence and wait 5 seconds betweent each line you
>> type.
>> 
>> Also may be there is some "check-back" cnx to the client's machine and
>> if FW is ON then machine cannot be "checked".
>> 
>> regards.
>> 
>> AG> One of my customers reported problems sending mail with an
>> TSmtpCli AG> application when the Windows firewall is turned on.
>> Strange is that AG> sending mail data fails for some reason and the
>> server drops the AG> connection after ~2 minutes (of inactivity) even
>> though port 25 AG> is explicitely opened.
>> 
>> AG> First log is with firewall turned off, mail is sent successfully,
>> AG> second log with firewall turned on and port 25 explicitely opened:
>> 
>> AG> 01.01.08 2:22:47 PM < MAIL FROM:<[EMAIL PROTECTED]>
>> AG> 01.01.08 2:22:48 PM > 250 2.1.0 <[EMAIL PROTECTED]>... Sender ok
>> AG> 01.01.08 2:22:48 PM < RCPT TO:<[EMAIL PROTECTED]>
>> AG> 01.01.08 2:22:48 PM > 250 2.1.5 <[EMAIL PROTECTED]>... Recipient ok
>> AG> 01.01.08 2:22:48 PM < DATA
>> AG> 01.01.08 2:22:48 PM > 354 Enter mail, end with "." on a line by
>> itself AG> 01.01.08 2:22:48 PM < .
>> AG> 01.01.08 2:22:48 PM > 250 2.0.0 m01JMoVp009311 Message accepted
>> for delivery AG> 01.01.08 2:22:48 PM < QUIT
>> AG> 01.01.08 2:22:48 PM > 221 2.0.0 ms-smtp-xyz.com closing connection
>> 
>> 
>> AG> 01.01.08 4:43:40 PM < MAIL FROM:<[EMAIL PROTECTED]>
>> AG> 01.01.08 4:43:41 PM > 250 2.1.0 <[EMAIL PROTECTED]>... Sender ok
>> AG> 01.01.08 4:43:41 PM < RCPT TO:<[EMAIL PROTECTED]>
>> AG> 01.01.08 4:43:41 PM > 250 2.1.5 <[EMAIL PROTECTED]>... Recipient ok
>> AG> 01.01.08 4:43:41 PM < DATA
>> AG> 01.01.08 4:43:41 PM > 354 Enter mail, end with "." on a line by
>> itself AG> 01.01.08 4:45:46 PM < Error=10054 Session aborted!
>> 
>> AG> Adding the application to the exception list makes no difference.
>> AG> Anybody any idea?
>> 
>> AG> --
>> AG> Arno Garrels



-- 
Mit freundlichen Grüßen
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mailto:[EMAIL PROTECTED]


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