"If I send my sales letter/update to an Internet business professional who
has e-mailed me several times promoting his various products, is this okay?"
-- Faith Call
The question is whether you have received permission to send e-mail to someone.
Kindly request permission to send your sales letter, then wait for permission.
Hundreds of people subscribe me to their newsletters without my permission,
so I end up getting thousands of pieces of unwanted and unread e-mail that is
the equivalent of spam. Respect your recipients' preference!