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 [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be