You can look up their associated email using a pgp key server, if they published it.

https://pgp.mit.edu/

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All key servers have the same info? 🤔

no. they dont sync

So how do I know which server his key is on? Sorry, noob here

If you are a windows user:

https://www.gpg4win.org/index.html

Otherwise, Kleopatra

Thanks, bud! I found this pretty neat write up on the basics of PGP encryption

https://www.varonis.com/blog/pgp-encryption