> We're an ISP and we believe we can't whitelist our addresses and we > definitely can't require authentication.
If you haven't your own network (ISP backbone) or users connecting from a defined range of IP's you SHOULD switch to SMTP-AUTH and you CAN prepare some usefull how-to pages, then inform your customers and give them some weeks to adapt the settings. With a little bit log-parsing you can also identify users that haven't enabled jet SMTP-AUTH and send them an additional alert. Markus --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
