nanog mailing list archives
Re: Time to check the rate limits on your mail servers
From: Adi Linden <adil () adis on ca>
Date: Thu, 3 Feb 2005 20:15:20 -0600
How about using SMTP AUTH and verifying the envelope MAIL FROM to match the actual user authenticating?that doesn't work if you have more than one email address.
You should know all your users email addresses. It shouldn't be too difficult to match the 'mail from' address with the user account. The only caveat would be that joe () hotmail com would actually have to use the hotmail smtp server to send mail.
This will make SPAM traceable and hopefully ultimately users aware that their PC is sending junk.auth is sufficient to make email traceable to your own customers.
And how is that? There isn't necessarily anything in an email indicating that it originated from an SMTP AUTH authenticated user. While a header could be added, it isn't a mandatory thing. Adi
Current thread:
- Re: Sender authentication & zombies (was Re: Time to check the rate limits on your mail servers), (continued)
- Re: Sender authentication & zombies (was Re: Time to check the rate limits on your mail servers) Sean Donelan (Feb 05)
- Re: Sender authentication & zombies (was Re: Time to check the rate limits on your mail servers) Douglas Otis (Feb 05)
- Re: Sender authentication & zombies (was Re: Time to check the rate limits on your mail servers) J.D. Falk (Feb 06)
- Re: Sender authentication & zombies (was Re: Time to check the rate limits on your mail servers) Douglas Otis (Feb 06)
- Re: Time to check the rate limits on your mail servers Edward B. Dreger (Feb 05)
- Re: Time to check the rate limits on your mail servers Adi Linden (Feb 05)
- Re: Time to check the rate limits on your mail servers Edward B. Dreger (Feb 05)
- Re: Time to check the rate limits on your mail servers Jørgen Hovland (Feb 05)
- Re: Time to check the rate limits on your mail servers Douglas Otis (Feb 05)
- Re: Time to check the rate limits on your mail servers Edward B. Dreger (Feb 05)
- Re: Time to check the rate limits on your mail servers Adi Linden (Feb 03)
- Re: Time to check the rate limits on your mail servers Niels Bakker (Feb 03)
- Re: Time to check the rate limits on your mail servers Adi Linden (Feb 05)
- Re: Time to check the rate limits on your mail servers Jason Frisvold (Feb 03)
- Re: Time to check the rate limits on your mail servers Adi Linden (Feb 03)
- Re: Time to check the rate limits on your mail servers Edward B. Dreger (Feb 03)
- Re: Time to check the rate limits on your mail servers Douglas Otis (Feb 03)