UC Davis Information & Educational Technology

Allow / Deny Lists

What are allow and deny lists?
Allow and deny lists are enhancements to the campus spam filtering service. Email recipients who have opted in to this service can customize it by creating allow and deny lists. All email originating from addresses on an individual's "deny" list is prevented from reaching that individual's inbox. All email originating from addresses on the individual's "allow" list is permitted to reach that individual's inbox, even if it would otherwise have been marked as spam and filtered away from the inbox.

Why implement Allow/Deny Lists?
  • Allow and deny lists permit individuals to specify addresses from which they do or do not want to receive email.
  • No single spam filtering measure filters 100% of spam. Allow and deny lists add an extra layer of protection against spam.
  • Legitimate email messages from news lists or subscriptions to professional online magazines or other publications may be filtered as spam (a "false positive"). By placing the sender's email address on their allow lists, recipients of these types of messages ensure that they will not be filtered as spam.
How do I create allow and deny lists?
To set up allow and deny lists now, go to the allow/deny list set up page.


Can email addresses be added to and deleted from allow and deny lists at any time?
Yes, and changes to accept and deny lists are effective immediately.

Can I add @ucdavis.edu addresses to my allow and deny lists?
Yes, campus email addresses can be added to allow and deny lists.

Where can I get more information about campus spam filtering services?
Visit the main spam filtering page for more information and links to set-up pages.