These all work:
Email
i@m.ac
PGP key below if you want to encrypt
Mastodon
@gxf@c.im
Bluesky
@m.ac
X
@gxf
Discord
Showfom#8888
S.EE
s.ee/gxf
PGP Key
public-key.asc
Email gets the fastest reply. Everything else gets checked when I remember to check it.