redman
Unless I’m missing something, 1st_Email_Antivirus is being used as your e-mail antivirus program. If you intend to leave it that way, then you simply leave your old settings in tact and disable the Mail Protection.
In your case, I would disable your e-mail and 1st Email and then got to:
start> Programs> avast! Anti Virus> Mail Protection Wizzard
Then follow the picture.