Email advertising has become very widespread with the increasing use of the Internet as a marketing tool. Companies are realizing that the attention of potential customers can be grabbed by filling their inboxes with informative messages that have attractive subject lines. Spam mails have been outlawed, paving the way for opt-in email advertising that is more cost-effective and has better response rates.

Email advertising is no doubt the cheapest form of advertising, since the ads can be sent to millions of people in a single day. The cost of email is also negligible compared to postal or any other kind of traditional advertising. With advancements in software and better Internet services, email ads have become very easy to send. There are many software tools for email advertising available today.