Using distribution lists as part of Symantec Messaging Gateway policy groups has unanticipated results when applying filtering policies and taking actions on email traffic.
When binding a distribution list to a policy group through its LDAP Distinguished Name and distribution list expansion is diabled:
When binding a distribution list to a policy group via an alias address and distribution list expansion is disabled:
When binding a distribution list to a policy group via an alias address and distribution list expansion is enabled:
Many of these behaviors will be addressed in a future release. Currently, binding distribution lists to policy groups to distribution lists through their primary mail address will provide the most predictable results.