nanog mailing list archives
Re: SPAM from own customers
From: "Brian Bruns" <bruns () 2mbit com>
Date: Tue, 2 Dec 2003 14:32:16 -0500
----- Original Message ----- From: "Suresh Ramasubramanian" <suresh () outblaze com> To: "Michel Renfer" <michel.renfer () lan ch> Cc: <nanog () merit edu> Sent: Tuesday, December 02, 2003 2:23 PM Subject: Re: SPAM from own customers
Virus filtering Rate limit (+ script to auto terminate user) and smtp auth on outbounds
SMTP AUTH is becoming risky if its not carefully setup and monitored. I can name one big time spammer who has warmed up to cracking weak passwords on e-mail systems that do SMTP AUTH. Means you'd have to filter your outbound mail servers port 25 from anyone not inside your network or a trusted source. Virus filtering is a must, but, alas, not all mail servers filter *outgoing* mail. Most filter only incoming mail. -------------------------- Brian Bruns The Summit Open Source Development Group Open Solutions For A Closed World / Anti-Spam Resources http://www.sosdg.org The AHBL - http://www.ahbl.org
Current thread:
- SPAM from own customers Michel Renfer (Dec 02)
- Re: SPAM from own customers Suresh Ramasubramanian (Dec 02)
- Re: SPAM from own customers Brian Bruns (Dec 02)
- Re[2]: SPAM from own customers Richard Welty (Dec 02)
- Re: SPAM from own customers Adam Debus (Dec 02)
- Re: SPAM from own customers Brian Bruns (Dec 02)
- Re: SPAM from own customers Chris Lewis (Dec 02)
- Re: SPAM from own customers Suresh Ramasubramanian (Dec 02)