How do you Generate Leads With Email Marketing?

Number of ways.

Purchase mailing lists and send mass marketing mailing opportunities - (COLD CALLING). However, this is becoming something of an issue with many companies now blocking those who bombard them with marketing especially uninvited.

Open site access - using an initial email to a business/customer to introduce them to the business concerned and offer an opportunity to visit a website where areas have been specifically created to enhance the offer being made and suggesting "subscription" to the site - many use this process in conjunction with a special offer