Most Comprehensive Web 2.0 List ever:
Most Comprehensive Web 2.0 List – EMAIL 2.0
Myemail – Check email anywhere. http://myemail.com/
Newsletterarchive* – Store & share your newsletters. http://www.newsletterarchive.org/
Onesens – Send teasing webmail messages. http://www.onesens.com/
Quickmail – Email2RSS. http://quickmail.johanfitie.com/
Sendspace – Email large files. http://www.sendspace.com/
Tempinbox – Receive inmail anonymously. http://www.tempinbox.com/
Trustmymail – Spam filter based on your circle of contacts. http://www.trustmymail.com/
Yousendit – Email large files. http://www.yousendit.com/