You will be prompted to input some information about the certificates you create.
You can enter any information you want here except Common Name (CN) which must be your mailname (e.g.mail.example.com).
Next we’ll configure Amavis, the software that ties together SpamAssassin and ClamAV with Postfix.
adduser clamav amavis
cat /dev/null > /etc/amavis/conf.d/15-content-filter-mode
You can test your setup by configuring your mail client to connect to your new mail server using email@example.com as your username and the password you chose (“changeme” in the guide).
Errors will usually show up in /var/log/mail.log
For more information regarding the mail database, testing using Telnet,and more information regarding how all these services are stitched together,
please see Flurdy’s guide.