Why when people reply to my email, the reply address is wrong?

Question

Why when people reply to my email, the reply address is wrong?
     What I did: 1) Mail > Preferences>Composing>Send new message from >[email protected]
     2) Selected the inbox for the correct email address before sending
     3) Selected the from from the composing pane

Answer 1

@Jscher2000.
It is still a frequent problem. We are dealing with people who are still using Windows XP some still using their trusty 2000 versions.
As for 2003. The same stupid setting is available in outlook 2013 see http://office.microsoft.com/en-001/outlook-help/change-the-message-format-to-html-rich-text-format-or-plain-text-HA102749169.aspx
I will stick to my original statement. Outlook is not an email application. Outlook is an excellent exchange client (its primary purpose) it is also an excellent corporate mail client as long as it is acting as an exchange client. Lotus domino and IBMs websphere have similar abilities and strengths luckily they are not flogged off to the general public as something they are not "a mail client". Outlook is, and does that job in a barely adequate way, providing the general user that is familiar with it's corporate functions a very skewed view of email and how it works.
@sloimpex have you tried right clicking the folder and selecting properties and then repair. Sometime the index get a little screwy and rebuilding it make the invisible visible.