What’s ‘Caution - External Email’? UNH Steps Up Efforts to Combat Phishing

What’s ‘Caution - External Email’? UNH Steps Up Efforts to Combat Phishing 

Phishing is a top cybersecurity threat to UNH. Personally-identifiable information - the primary target of phishing attempts - which falls into the wrong hands can cause much financial and reputational damage to the University and its employees. Phishing attacks are often launched by including malicious attachments or links in email. When recipients open these malicious attachments or click on the links, it can spark an attack.  

Email originating from outside UNH should be approached cautiously, especially messages with subject matter containing information on password changes, email quotas, benefits changes, and more. A high percentage of phishing attempts targeted towards the University often comprise these topics.

To combat phishing and help employees identify potentially fraudulent email, UNH has activated external email tagging. Starting January 16th, 2018, messages sent from outside UNH will now be marked with red text that reads “Caution - External Email” in the top left of the email. 

Messaged tagged “Caution - External Email” does not mean the email is malicious, only that recipients should take caution. Do not click on links or open attachments in messages with which you are unfamiliar. All email originating from outside the university, except for approved services, will be tagged with this message.  

For additional information on spotting/reporting phishing attempts, visit UNH IT’s webpage https://www.unh.edu/it/the-phishbowl .


Things to know about External Email Tagging:

The actual text of the External Email Tag is “Caution - External Email”. The system makes an effort to match the style of the message, so font of the tag will vary.

External Email Tag is applied to the vast majority of external messages sent to Faculty and Staff email addresses ending in @unh.edu, @usnh.edu, or @granite.edu

Note: It is possible to get an external message without the External Email Tag if emails are processed in a certain way.

Tag is informational to help client be cognizant of message origins. The tag does not indicate that a message is unsafe; conversely, a message’s lack of an External Tag does not indicate it is safe.



Please contact us here – https://td.unh.edu/TDClient/Requests/ServiceDet?ID=108


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  • Author: UNH IT
  • Department: Enterprise Collaboration & Messaging
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