[Zope] Help: Sending Batch Email

Has anyone done any mass emailing from Zope? I have an external method that tries to loop over a bunch of Member Objects and send an email to each. Unfortunately it is not working. What it does is sometimes send an email to the first member most of the time it sends no email at all. Here is my External Method. Any help would be greatly appreciated. def doSpam(self): """ sends mail to all Members """ if self.MailHost: for id, object in self.members.objectItems('member'): mail=self.SPAMLetter(self, None, username=object.username, password=object.password, email_address=object.email_address) mhost=self.MailHost mhost.send(mail) return "Mail Sent"