how to use bbdb-snarf to capture addresses from point

Hello,

i want catch address or email information from point inside a buffer or
from kill-ring. as far as i know, bbdb-snarf from bbdb3 would be a
candidate to use. but it doesn't find email addresses or names from text
inside a message buffer, only from To: or From: or CC: inside message
buffer. i use rule eu or rule mail. i use gnus and emacs 26.3 on linux
mint 19.3.

any ideas?

Regards
Poul