I have noticed that probably 99% or more of the messages in
which my first or last name is the first word of the subject are spam.
Is it safe to use the anchored RE-style method of describing this
condition in my headers-use file like:

Subject:.*^martin

What I don't want to happen is to have messages with my name
in the subject shown as spam when my first or last name is part of the
subject such as "Trouble Ticket for Martin McCormick."

I did try a line like
Subject:.*martin

and it certainly worked, but it also false-triggered on useful
messages in which my name just appeared several words in to the
Subject: line.

Sure, I could just try it, but occasionally one can introduce
an insidious problem that isn't apparent for several days, etc. Thank you.