hello TomKunaJacob, since your question isn't directly related to support for mozilla's products we won't be able to answer it here (please refer to the Mozilla Support rules and guidelines). thank you for your understanding...

Phillip, thanks for your reply, but Yahoo must know what systems available for sending bulk-e-mails at one are compatible with yahoo.. In fact, it was yahoo help that once told me years ago that such services exist

yahoo's support is available here: http://help.yahoo.com/kb/index?page=product&y=PROD_MAIL_ML