Allowing: Content-based spam checking is not performed on domains or email addresses that are on your allow list. However, front line tests such as RBL, SPF, greylisting, virus checking and attachment scanning are still applied.
Blocking: Spam checking is not performed on domains or email addresses that are on your block list, they are automatically blocked.
It's important to know the following when using allow and block lists:
An email address cannot be allowed and blocked at the same time. If you add an email address to the block list that is already on the allow list, it will automatically be removed from the allow list.
Per-recipient allow lists and block lists overrule global allow lists and block lists for a domain. See below for info on list precedence.
Allowed senders bypass the SpamTitan anti-spam engine, however, they will still be scanned for viruses and banned attachments.
Allow and block list sender testing is performed after a message is received, therefore, front line tests such as RBL, SPF or greylisting may still apply.
Entries cannot exist at both the domain group level and the domain level. When adding a new domain group block list or allow list entry, if the entry already exists for any of the domains in the domain group, it will be removed as a domain level entry and marked as a domain group level entry.
Allow and Block List Precedence
There are four allow and block list levels in SpamTitan. Each is accessed by logging in at the appropriate access level, or by impersonating that role as your access allows:
MSP allow list & block list: applies to all domains and recipients for each of an MSP's customers.
Customer allow list & block list: applies to all of a customer's domains and recipients.
Domain allow list & block list: applies to a single domain and all its users, e.g. example.com.
User allow list & block list: applies to a single recipient. For example, firstname.lastname@example.org.
A Global list is overruled by a Domain Group list, which is overruled by a Domain list, which is overruled by a User list.