Protect Your Mailing and Distribution Lists

You can protect mailing and distribution lists from spam and viruses. These lists are addresses that deliver a message from outside your network to a group of people in your domain, such as partners@your_domain.com, or noon_cyclers@your_domain.com.
Often, when users complain about spam passing through, they are
receiving the spam through their membership in a mailing list.

To protect a mailing list from spam and viruses, alias the mailing list to an existing or new user account.

Do not add the mailing list as a user account. Under these circumstances,
the mailing list is treated as a user, and all members of the mailing
list, including those outside of your organization, receive the
notifications and quarantine summaries.

You have two options to protect mailing lists:

Alias the mailing list to an existing user, such as an administrator or the designated owner of the mailing list.

Considerations: The mailing list receives the same settings as the user—spam filters, approved and blocked senders, etc.—which may or may not be appropriate for the mailing list.

Create a new user account for the mailing list and alias the mailing list address to this account. You can choose to send the notifications to the designated owner of mailing list.

Considerations: The advantage of this method is that you can specify the filter settings for the mailing list. However, this is another user account to manage.