Re: [twsocket] Strange e-mail problems Server 2003

2008-01-02 Thread retnyg
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

Re: [twsocket] Strange e-mail problems Server 2003

2008-01-02 Thread Arno Garrels
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. No, the delay is 2 minutes and 5 seconds. One thing I can imagine is a problem with MTU Discovery, since small packets (SMTP command/response) go thru, may be t

Re: [twsocket] Strange e-mail problems Server 2003

2008-01-02 Thread Dod
Hello Arno, I see in the log that there is 5 seconds delay between DATA and the 10054 error. This may be interesting. 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 time

Re: [twsocket] Strange e-mail problems Server 2003

2008-01-02 Thread Fastream Technologies
My experience with these so-called "smart" firewalls doing stateful inspection is that they are dumber than they seem! I had a Cisco cable router back in 2003 which was altering PORT/PASV commands' port numbers in FTP. Back then, it was an unknown issue to me and caused lots of frustration... Good

[twsocket] Strange e-mail problems Server 2003

2008-01-02 Thread Arno Garrels
Hi, One of my customers reported problems sending mail with an TSmtpCli application when the Windows firewall is turned on. Strange is that sending mail data fails for some reason and the server drops the connection after ~2 minutes (of inactivity) even though port 25 is explicitely opened. Firs