Outlook 2013 - Emails from external domains put a suffix of <EXT> in the subject line

I am sure EXT probably stands for external but how is that set? Any external email this lady gets has a prefixed to the subjext line.
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Alexei Kuznetsov (Outlook MVP)Connect With a Mentor CEOCommented:
Also, try to run Outlook in safe mode (outlook.exe /safe) to check if the issue persist. If not, then she has the add-in installed that puts this prefix. One more thing to try: check if she has VBA macro that puts this prefix for incoming messages (press Alt+F11 in Outlook to open VBA Project and dig through available modules).
Adam BrownConnect With a Mentor Sr Solutions ArchitectCommented:
Most likely that is added by either a Transport rule on the Exchange server or a rule in her Outlook. If she's the only person who gets that in the organization, it's less likely to be a transport rule in Exchange, but still possible.

Edit to add: That's not something that would occur naturally with an Exchange server. You would have to configure either Exchange or Outlook to do that type of thing.
LockDown32OwnerAuthor Commented:
The first thing I did was check her rules. No rules. They are simple POP3 accounts at GoDaddy.
LockDown32OwnerAuthor Commented:
No real solutions but thanks for the suggestions gents
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