How to send Bulk email with SMTP server
Solution 1:
You can register with YAHOO and GMAIL as mass emailer.
Check http://mail.google.com/support/bin/answer.py?hl=en&answer=81126
Same for Yahoo:
http://help.yahoo.com/l/us/yahoo/mail/postmaster/bulkv2.html
And others. Do it, then you have more luck ;)
Solution 2:
Because they use a zillion zombies each sending max-emails-before-cutoff minus one emails?