Brian M. wrote:

Hello all: I am fighting this same problem. I have tried shutting
down the Norton AntiVirus software and this made no difference. This
may or may not be relevant: copies of messages that go into the Sent
Mail folder do show the first letter of the message subject - it is
only in the received message that the first letter is deleted. Any
help on this would be appreciated.

Most likely, then, the problem is on the recipient's end.
--
Brian Tillman