Even if these links would count as 1k backlinks - most of the come from the same class c ip and count only once. And you may be put into the sandbox because of spamming...
Heres my take on this thread. A link DONT need an anchor text to count as a backlink for search engines. Myspace bulletins wont give you a backlink because search engines dont crawl them.
MySpace bulletins are private, so no point in backlink. Can SEs see your email on a webmail account? No! So why can they see bulletins?
Okay well myspace as a example.. also SE's can crawl your email if it's on a online account how do you think hotmail and googlemail show there adverts ? Bot's crawl the email's to show relevant adverts