SMTP problems

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Original Message

Name: touchofike
Date: August 4, 2005 at 09:11:55 Pacific
Subject: SMTP problems
OS: Windows XP Pro
CPU/Ram: AMD 2200+ / 768 MB

Comment:

I got this error from my smtp server
0xc00402c7
Message sender was <>.
Basically the problem is that we cannot send mail from our domain to one of our email addresses using a mailing program we developed. Any ideas would be appreciated.

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Response Number 1

Name: SmittyZ3M
Date: August 4, 2005 at 09:33:54 Pacific
Subject: SMTP problems

Reply: (edit)

Sounds like the program isn't issuing the MAIL FROM: <address> command to the SMTP server.
http://www.yuki-onna.co.uk/email/smtp.html
That has a list of SMTP commands, I think those commands are specific to the sendmail server. With sendmail, you have to first identify the MAIL FROM: address before you can proceed with anything else. If you try to start the DATA portion (actual body) of the e-mail before indicating the MAIL FROM:, sendmail reports back 503 No sender.
Maybe this is what is happening to you?

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