Here's a tip I learned from this board:
Close windows mail
Set your windows mail to defaults by clicking the start button then
typing in defaults in the search window, click on defaults then click on
Windows mail defaults when it comes up. When u reopen Windows mail try
sending that email again it should work. the only problem is u may have
to keep going through this process each time u want to send an email
from a web page..............as I have to

Something to do with the
registry??
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scr621