Why are all my messages bounced back after installing the F-Secure Internet Mail 6.3x version?
By default, F-Secure Anti-Virus for Internet Mail is set to verify recipients and no allowed recipients are listed. Specify recipients who are allowed to receive e-mail messages to the Allowed recipients table or clear the Verify recipients checkbox so that e-mails can be delivered to recipients. Use the standard username@example.com format to specify the allowed addresses. You can use wildcards:?and *.