OL not recognizing outgoing reply SMTP

[Philip]

I send/receive dozens of e-mails daily using outlook 2002
as the transport and Primary.net as my ISP. I regularly
receive e-mail from one user though the OL transport, but
whenever I try to reply or send to same, it comes
back "undeliverable-user unknown". However, I can
sucessfully send the e-mail if I bypass OL, log directly
onto my ISP and send it from there.

Any suggestions.

 

[Jeff Stephenson [MSFT]]

When you say you log directly onto your ISP and send from there, I assume
you mean you're using your Web browser? Could you turn on diagnostic
logging (see
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q300479) and post
the OPMLog.log file (preferably as an attachment) after you get one of these
rejections?