I own a Disc Jockey business and have participated in several bridal shows. I received a list of e-mails from brides that attended the bridal shows. Sometimes there are more than 3000 e-mail addresses and I would like to send e-mails offering my services to the brides that attended the shows I paid to participate in and gave permission for me to e-mail. How do I send a large number of e-mails at one time? Is this possible and what steps do I need to take?