Subject: textsec-email-address-suspicious-p: Wrong type argument: stringp, nil

From: Dan Jacobson <[email-masked]>
Date: Tue, 21 May 2024 13:07:27 +0800

When sending a mail in gnus, putting
Bcc: jidanni
gives
Email address jidanni looks invalid; send anyway? (y or n)
answering y causes
textsec-email-address-suspicious-p: Wrong type argument: stringp, nil

Yes, no problem using
Bcc: jidanni@jidanni.

emacs-version "29.3"