Email, Spam Control, Still receiving email from someone on Block List

Problem: I put someone on my Personal Block List, but I'm still receiving email from them.

There are a few issues to consider when blocking unwanted email senders:

1)  The Campus offers two lines of defense from unwanted email senders, Spam Control which is separate from Exchange. Spam Control represents the spam filtering and protection at the network border via the Campus Email Relays. Proofpoint is the software we run on the Email Relays. Exchange is one of the many email servers/services sitting behind the Campus Email Relays.

You can block specific email addresses or whole domains at the border via Spam Control. More information about configuring 'your' spam control settings can be found in the KB article:   Email, Spam Control, Spam Control FAQ.

2)  Spoofed email:   The name and address from which an email message appears is often not the actual sender. If you look at the full headers of the email message (see solution 
Office 365, Email, Exchange, How do I view mail headers?), you can find the actual email address of the sender listed in the X-Spam-OrigSender field.  

For example, the email message might be listed as being sent "From:" but the X-Spam-OrigSender lists the mail address as "". So if you added "" to your Block List, the email would from could still make it through.  If this domain is constantly sending spam, you can block all email from the domain by adding it to your block list.   e.g. 

3)  Spammers constantly change the true address on messages to circumvent block lists.  While the Proofpoint Spam Control filters are updated daily, it's not 100% effective because of the dynamic nature of spam. One way you can help update the spam signatures to identify new spam campaigns is to forward the offending email to  Email sent to this address is automatically submitted to Proofpoint for spam evaluation and if the email is determined to be spam, they will generate a new spam signature and update our email relays.  

To learn more about the Spam Control service please refer to the KB article:   Email, Spam Control, Spam Control FAQ.

Keywords:emails, spam control, receive, blocked, blocking, sender, orig   Doc ID:48993
Owner:Email Relays E.Group:University of Illinois Technology Services
Created:2015-03-18 10:21 CDTUpdated:2020-09-13 11:16 CDT
Sites:University of Illinois Technology Services
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