Holy cow, I wrote a book!
Here are some subject lines I've seen over the past few years
Sure, using exclamation points, all capital letters, or
strange eye-catching punctuation marks makes it easier for you to
spot replies to your message in your inbox,
but it's also rude to your readers,
who almost certainly do not consider your message as important
as you do.
Imagine if everybody did this.
If it's that important that it easy for you to spot replies to your message,
set up a mail filter rule that highlights them.
And, just because I collect these things, here are some
unhelpful subject lines that I've seen in the past six months:
Sometimes, the people who commit the sin of the useless subject line
also follow up with the second sin of
repeating their question verbatim because nobody answered it.
Nobody answered it because the subject line was not obviously in anybody's
specific area of expertise.