System.Net.Mail SmtpClient SMTP Quit Command

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Philip - 14 Sep 2007 18:36 GMT

I am using System.Net.Mail for sending mail.

How do I force a SMTP Quit command (SMTP session termination) with the
SmtpClient class ?

Even when the SmtpClient object goes out of scope and I reinstantiate the
SmtpClient class the SMTP session appears to not be terminated. What causes
SMTP session start-up and shutdown with the System.Net.Mail SMTPClient class ?

Thanks

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Philip

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Henning Krause [MVP - Exchange] - 17 Sep 2007 09:31 GMT

Hello,

IMHO, this is major implementation flaw in the current SMTPClient. The
SMTPClient uses the ServicePointManager internally to cache connections, so
it doesn't send a QUIT command. I don't know if one can gracefully close
such servicepoint instance.

Kind regards,
Henning Krause

>I am using System.Net.Mail for sending mail.
>
[quoted text clipped - 8 lines]
>
> Thanks

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Philip - 17 Sep 2007 15:00 GMT

I need to be able to close the SMTP session and force a
reestablishment.....can you suggest an alternative ?.... another class
?....anything ?

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Philip

> Hello,
>
[quoted text clipped - 18 lines]
> >
> > Thanks

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Eugene Mayevski - 17 Sep 2007 15:15 GMT

Hello!
You wrote on Mon, 17 Sep 2007 07:00:02 -0700:

P> I need to be able to close the SMTP session and force a
P> reestablishment.....can you suggest an alternative ?.... another class
P> ?....anything ?

Check the SMTP client class in SecureBlackbox (see http://www.eldos.com/sbb/net-mime.php
for details)

With best regards,
Eugene Mayevski
http://www.SecureBlackbox.com - the comprehensive component suite for
network security

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System.Net.Mail SmtpClient SMTP Quit Command

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