Merit Network
Can't find what you're looking for? Search the Mail Archives.
  About Merit   Services   Network   Resources & Support   Network Research   News   Events   Home

Discussion Communities: Merit Network Email List Archives

North American Network Operators Group

Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical

Re: SMTP store and forward requires DSN for integrity (was Re:Clueless anti-virus )

  • From: Douglas Otis
  • Date: Fri Dec 09 13:04:05 2005


On Dec 9, 2005, at 9:22 AM, Todd Vierling wrote:

Actually, I get about ten to twenty times as much virus blowback as I get spam from trojan-zombie boxes.

That's because the virus blowback comes from otherwise "reputable" MTAs, whereas the spam comes form zombies that are often already blacklisted, or are in known dynamic pools that are blocked here. Thus the zombies get blocked long before DATA, but the "reputable" MTAs sending the backscatter don't get caught so early.
I am having difficulty understanding why a one time investment in Bounce-Address Tag Validation which can be in operation immediately and offer 100% "blowback" protection from _all_ sources using trivial resources is not being considered? The more who lock their back door, the fewer times you will find miscreants checking to see that it is locked.

-Doug




Discussion Communities


About Merit | Services | Network | Resources & Support | Network Research
News | Events | Contact | Site Map | Merit Network Home


Merit Network, Inc.