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Old 19 Apr 2017, 02:43 PM   #2
BritTim
The "e" in e-mail
 
Join Date: May 2003
Location: mostly in Thailand
Posts: 3,090
FastMail blocks tracking of loading of images directly in emails. However, when you open attachments, all bets are off.

Most likely, you opened the PDF attachment, and that contained a remote link that was picked up by their system.
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