Looking at Scott's response below, I'd like to have the Refuse Null Sender switch off, but we have a situation where spammers are forging valid e-mail addresses. We have thousands of bounces showing up for messages never sent from valid accounts here. For example, [EMAIL PROTECTED] may be a valid account but he is not a spammer. But a spammer uses [EMAIL PROTECTED] forges tens of thousands of messages with this as the 'reply to' account in headers. Since the spammer has many unvalid accounts in his spamming, [EMAIL PROTECTED] is swamped with thousands of bounced mails for mails that he did not even send... This is now happening to hundreds of accounts here because it looks like the spammer's software is randomly selecting them from a spam list.
I have re-enabled 'Refuse Null Senders' to relieve this problem, but would like to find a more compliant solution. Does any one know how to attack this issue in another way? -- Roger Heath [EMAIL PROTECTED] www.rleeheath.com R> Well, the real question is why do you think that you are safer by R> rejecting those E-mails? I'm not aware of any safety issues. The R> only issue I am aware of is that a small percentage of spammers R> send their spam that way. R> R> The NULL <> sender has been used for over 20 years for bounce R> messages and other automated messages (such as vacation messages, R> and those awful spam confirmation E-mails, and Delivery Status R> Notifications). R> R> So the choices are : R> R> [1] Comply (leave "Refuse NULL <> Senders" at the default UNchecked R> setting). Pros: Your mailserver will act as expected. Cons: As very R> small percentage of spam is sent this way, but it can be detected R> using standard spam control. R> R> [2] Refuse NULL <> senders. Pros: You'll have that "safe" feeling. R> Cons: You won't receive all your E-mail, because you're blocking R> some of it, and because you'll get listed at R> http://www.rfc-ignorant.org . R> R> -Scott -- ActivatorMail(tm) ver.01010031 Scanned for all viruses by www.activatormail.com intelligent anti-virus anti-spam service --- [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.
