Thanks! That's about the tool I've needed. But do you have experience with it? Does it has many (any) false positives? Will it reject many valid clients?
On 6/19/06, Ilya Konstantinov <[EMAIL PROTECTED]> wrote:
The thought-work was already done for you. As Oded said, read about Sender Policy Framework (SPF). Using a mail server with SPF is about all you can do; it ain't good news, but trust the smart people who thought SPF up there isn't a better option. Elazar Leibovich wrote: > That's very true, I haven't thought of that. Thanks. > Any smarter idea? Maybe I can filter emails coming from my host email > address and then make sure they're not recieved: from unknown source > (spammers has the habbit of including your hostname in the from: > field, so that you'll whitelist them) > > On 6/19/06, Ehud Karni <[EMAIL PROTECTED]> wrote: >> On Mon, 19 Jun 2006 04:44:25 -0700 (PDT), E Leibovich wrote: >> > >> > Is there any automated tool to bounce email not from >> > the original server? That is, is there a tool that >> > bounces back emails claiming they're from hostA (their >> > from:[EMAIL PROTECTED]) however they're really from hostB >> > (that is, recieved: from hostB...). >> > This seems a good way to prevent many spam messages >> > that claim to originate from your server. >> > Is it a good idea? >> > Is there any written script that does so? >> >> This is NOT a good way. Many mailing lists and other sources (e.g. >> small offices sending their mail through their ISP) will bounce. >> Even your email - from: <[EMAIL PROTECTED]> - had come from >> [EMAIL PROTECTED] Remember - all the headers (except >> the last "Received:", created by your computer) may be forged. >> >> Ehud. >> >> >> -- >> Ehud Karni Tel: +972-3-7966-561 /"\ >> Mivtach - Simon Fax: +972-3-7966-667 \ / ASCII Ribbon Campaign >> Insurance agencies (USA) voice mail and X Against HTML Mail >> http://www.mvs.co.il FAX: 1-815-5509341 / \ >> GnuPG: 98EA398D <http://www.keyserver.net/> Better Safe Than Sorry >> > > ================================================================= > To unsubscribe, send mail to [EMAIL PROTECTED] with > the word "unsubscribe" in the message body, e.g., run the command > echo unsubscribe | mail [EMAIL PROTECTED] >
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