E-mail can be an effective component of your marketing campaign, however you can't rely on it in and of itself.
There are many factors to consider when using e-mail marketing:
-Only use opt-in addresses.
-Include your address and an opt-out option.
-Hide the other recipients' addresses and don't send to more than 49 addresses at once to avoid spam blocking software.
-Don't abuse the list and send e-mails too often.
For more helpful tips, read the full article from The Courier News here.