I see the pricing plans of providers such as aweber and getresponse and can see they charge based on the size of your list but offer unlimited emailing. The unlimited emailing might sound appealing at first, but if your list size is 2,000 are you really going to email them every day? That would be 60,000 emails sent if you emailed your list of 2,000 every day for a month.
Which do you prefer:
1) unlimited email but restricted by list size
example: $24.99 for unlimited emails, but limited list size up to 3,000
2) limited emailing, but unlimited list size
example: $19.99 for limited emails 25,000, but unlimited list size