Fix that file!
If you’re using the default atom.xml template provided by Movabletype, you’ll need fix that file to stop showing your actual email address address as entered in your blog setup meant to receive notification and comments. This could potentially be a call for spammers to harvest your genuine email addresses.
< $MTEntryAuthorEmail encode_xml="1"$>
Fix that line now!
Update: So is the problem with index.xml. Remove the following line:
< $MTAuthorEntryAuthorEmail$>
Fix the above to:
< $MTAuthorEntryAuthor$>
