The filtering system has Friends (whitelist) and Enemies (blacklist) options to filter by email address, domain name, or IP address.
• Friends: Mail from these addresses and domains will not be filtered for spam.
• Enemies: Mail from these addresses and domains will be quarantined. If you have a legitimate sender that you do not want to receive further email from, you can add an entry (email address or domain) to the Enemies blacklist
Friends and Enemies lists are not required to ensure that you do not receive spam
If there is a conflict between an item on your Friends list and an identical item on the Enemies list for the entire domain (set by your email administrator), your Friends setting takes precedence.
GoSecure does not recommend using these lists to manage email accounts because spammers have adopted techniques to send email from addresses within your own domain (including your own email address). Your Friends list, in this case, would override the spam filter rule and result in the spam and viruses being delivered to you even though the system had identified them as spam. Similar unintended consequences can result from the use of the Enemies list.
Note: GoSecure strongly advises using the email system for a month or more before adding anyone to your Friends or Enemies lists. Testing indicates that these lists are more effective when they are used sparingly.