I found the following forum post about POTA self spotting with Winlink. I have not tried it yet but I plan to soon.
VA3BLV Jun '22
- Self-Spotting using email/Winlink…
POTA spotting actions can be submitted by sending an email (Winlink/other) to POTAGW@outlook.com with all commands being sent in the subject line only. The body of emails will be ignored.
The following commands are currently supported:
SPOT [ActivatorCall] [ParkReference] [FreqInKhz] [Mode] [Comment]
Example: SPOT W4PI K-TEST 14321 SSB This is a comment
- View Active Spots
VIEWSPOTS #An email reply will be sent with a list of active spots.
73, Marc - VA3BLV
Zettelkasten ID potaspottingwinlink-2023-05-04-1540