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Old 14 May 2019, 10:58 PM   #7
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,578
Arrow Use search for X-Delivered-To header

Originally Posted by BritTim View Post
It looks as though your next move is to try to make a list of all the aliases you have used. I believe this is possible through clever incremental use of Advanced Search. You want a list of all the distinct X-Resolved-to headers...
The idea is good but thatís the wrong header. You need to use X-Delivered-To to discover the address used to deliver a message to the Fastmail incoming SMTP server. The X-Resolved-to header shows the target address of the alias, so it hides the actual alias address.

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