Newsletter Email
Newsletter Emails are sent regularly and vary in consistency from daily, weekly to monthly. Newsletters are a proven communications tool that help businesses achieve brand awareness, customer retention, ad revenue, and other goals.
http://37assets.s3.amazonaws.com/newsletters/37signals/2010-06-08.html
Announcement Emails
Announcement emails are usually sent out when the business has a time-critical announcement to make. Such as 1 day only sales, keynote speaker, grand opening, etc. These are usually very short and contain 1 call to action.
http://thepublishersclub.co.uk/emails/LDN01/
