Summary: OIT Spam Mitigation Strategies
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OIT Spam Mitigation Strategies
Franklin OIT invests substantial resources in spam mitigation. We implemented three major
layers of spam filtering: firewall filtering, server-side filtering, and email client filtering.
We deployed spam filtering on our firewall to tag messages that match predefined spam criteria.
The firewall adds "FCOIT Suspected Spam:" to the subject line of these messages. We created
exemption filters for individuals that wish to opt out of firewall-based filtering. Please contact
firstname.lastname@example.org if you wish to opt out.
We block 150,000 spam messages per month via server-side filtering. There are several filtering
methods used directly on the email server to reduce unsolicited emails.
1. Email Address & Alias Filtering
Email aliases are for internal use only. Exceptions have been made to allow specific public
aliases to accept all types of emails with limited filtering.
2. Sender Filtering (Block/Allow Lists)
We block messages sent by known spammers that have been identified by third parties, and
we also maintain our own internal list of known spammers. Many legitimate senders use