Navigation:  System Requirements and Installation > Firewall > Comodo Internet Security

Depending on your firewall settings, the Firewall could show one of the messages below during the installation.

To secure a proper installation and trouble-free functioning of SmartSerialMail you should allow all shown messages and press 'Remember my answer'.

If there are any problems with sending after updating SmartSerialMail or your firewall please read 'Delete Firewall-Rule'.