I'm using Outlook Express on Windows XP (SP3). Recently I lost the ability to relay mail directly through my e-mail host via SMTP-AUTH, so I switched to using my ISP's relay. That required me changing the SMTP settings of course, and they also require SMTP-AUTH. For some reason, Outlook Express is putting the authentication name from the SMTP-AUTH into the header as my e-mail address (which is completely wrong!). The account e-mail address is set properly, but Outlook Express seemingly ignores it. I went ahead and also set the reply-to address, and that gets set properly in the header (but the "From" is still wrong!).
Example of what someone sees in the header when receiving e-mail from me:
From: Brian Knoblauch <firstname.lastname@example.org> Reply-to: Brian Knoblauch <email@example.com>
Any ideas on how to force Outlook Express to use the mail address for the uh, mail address? :-)