We have turned this on several times only to see listserver emails blocked that were legitimate emails. We liked the spam that was blocked, but along with it we found tons of emails in our log that were legitimate listserver emails. At first we thought this was all spam, but upon closer look we found that many listserver or newsbot emails have null senders, including many from the likes of ZDNet and other major news organizations. So look closely, with null senders on, you may be blocking legitimate mail.

-- Roger Heath

advanced internet desktop: www.activatordesk.com antivirus antispam email : www.activatormail.com master internet index : www.infogrid.com ems als communications : www.general-devices.com

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P> I have null senders blocked at my mail server. About 80% of the spam I get P> has null senders. This keeps me from receiving them. RFC compliant or not, P> it is staying the way it is on my server. Go ahead and block me if you P> must.

P> # -----Original Message----- P> # From: IMail_Forum-owner@list.ipswitch.com P> # [mailto:IMail_Forum-owner@list.ipswitch.com]On Behalf Of Scott Perry P> # Sent: Friday, May 11, 2001 4:00 PM P> # To: IMail_Forum@list.ipswitch.com P> # Subject: RE: [IMail Forum] Time to fix "Refuse NULL <> Senders" option! P> # P> # # >> Thanks for the heads up. In my opinion they are going about this all # >> wrong. What they should fix is bounced messages being sent null # >> sender <>. That is rude. P> # P> # Actually, the RFCs require that the bounce messages to be sent P> # that way. It's to help minimize the chance of mail loops. P> # P> # P> # -- P> # -Scott P> # P> # Declude: Anti-virus and Anti-spam solutions for IMail. P> http://www.declude.com P> --

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