Something else you can try -- rename your ~/.smime and reinitialize it, so that it is completely empty. Then, send your mutt account a signed message from your Outlook account. Extract the S/MIME sig from it, and then reply to it, with encryption turned on. See if Outlook can decrypt -that-.
-- Mike Schiraldi VeriSign Applied Research
msg24706/pgp00000.pgp
Description: PGP signature