Yes, I know, Thunderbird doesn't use GnuPG. However, for those who do: apparently, Thunderbird is a big fan of attaching public certificates (and/or revocation certificates, for revoked keys) to outgoing emails for *every private certificate on your keyring*, regardless of whether that private key is actually associated with the account in question.

This has the potential to leak personal information, especially if you're in a use case where you have two or more keys presenting different pseudonymous identities. Without knowing it, you might accidentally reveal you're the common actor behind both.

I apologize for bringing the non-GnuPG content to the list, but please make sure your correspondents are aware of the possible risk in how Thunderbird likes to attach public certificates. That's all. Thank you!

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