1) Using the assp email interface: you should send an email to assp-white@yourdomain.com (to whitelist an email) and put the email user@domain.com in the body section (where user@domain.com is the email address to be whitelisted).
2) Each time you send an email to someone, the email will be whitelisted automatically, so the user should never reply to a spammer.
You can also whitelist a full domain name. You should send an email to assp-white@yourdomain.com and you should put*@domain.com on the body of the message (where domain.com is the domain name to be whitelisted).
In a short time you will receive a whitelist confirmation (Whitelist Addition Report).
Note: You must send this email from a valid @yourdomain.com email account and using the smtp mail.yourdomain.com. Also please be sure that "My outgoing server (SMTP) requires authentification" is checked on your email client (smtp advanced settings) .
When the whitelist is reloaded on your mailserver, the whitelisted email will bypass every email filter.
