Bands and Promoters,
Do NOT automatically (and without permission) add bloggers, labels, etc. to your mailing list for pushing emails. It’s rude, unprofessional, and chances are you will be marked as SPAM. No one likes to feel taken advantage of, and no one wants their inbox clogged with all of your messages.
If you want to reach out to someone about your music, make a personalized appeal and customize your message. It’s like applying for a job, you don’t just send one cover letter to everyone.
PS: If you HAVE to send out a mass message, be sure to BCC all of the contacts you send to, then it at least looks a little more personal, and keeps other less-worthy promoters from stealing emails for spam.