I am using Outlook Express 6.0 and I use the Mapi Controls in VB6 to send email via OE6 like this:

Code:
mapMess.RecipDisplayName = Text3.Text
    mapMess.RecipAddress = Text5.Text
    
    mapMess.MsgSubject = "Customer Newsletter"
The problem is this always uses my OE6 default email address however I want to use my "Email-to-SMS" service for which I need to specify my other email address (not the default) as the "From" email address.

How do I specify a different "From" address so that it does not use my default OE6 email address but my other email address instead?