In the past, I would have agreed with you that it's a nice jesture to send holiday greetings, but today hmmm it all depends on how much spam each person is getting. This has been the spammiest year so far. In 2001, only about 7% of email was spam. Today, it's over 50%. Those who don't get much of it may think your note is nice, but the others could very well consider you as a spammer even though that's not your intention.