Modest Proposals for Modest Proposals for Modest Proposals for - - PowerPoint PPT Presentation

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May 30, 2023 211 likes •271 views

Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest

SLIDE 1

Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Layered Email Authentication Layered Email Authentication Layered Email Authentication Layered Email Authentication Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Modest Proposals for Layered Email Authentication Layered Email Authentication Layered Email Authentication Layered Email Authentication Layered Email Authentication Layered Email Authentication Layered Email Authentication Layered Email Authentication

APCAUCE/APRICOT – Kyoto 2005

D. Crocker

dcrocker@bbiw.net Brandenburg InternetWorking bbiw.net

APCAUCE/APRICOT – Kyoto 2005

D. Crocker

dcrocker@bbiw.net Brandenburg InternetWorking bbiw.net

SLIDE 2

D. Crocker

APCauce/Apricot – Kyoto, 2005 2 2

Email is… Email is Email is… …

MUA MUA MUA MUA MUA MUA MUA MUA MSA MSA MSA MSA MSA MSA MSA MSA MTA MTA MTA MTA MTA MTA MTA MTA MDA MDA MDA MDA MDA MDA MDA MDA MUA MUA MUA MUA MUA MUA MUA MUA MTA MTA MTA MTA MTA MTA MTA MTA Peer Peer MTA MTA

Mail Agents Mail Agents

MUA MUA = User = User MSA MSA = Submission = Submission MTA MTA = Transfer = Transfer MDA MDA = Delivery = Delivery

Complicated! Complicated! !

Peer Peer MTA MTA MTA MTA MTA MTA MTA MTA MTA MTA MDA MDA MDA MDA MDA MDA MDA MDA MUA MUA MUA MUA MUA MUA MUA MUA MDA MDA MDA MDA MDA MDA MDA MDA MSA MSA MSA MSA MSA MSA MSA MSA . .forward forward MTA MTA MTA MTA MDA MDA MDA MDA MDA MDA MDA MDA List List List List List List List List MTA MTA MTA MTA MTA MTA MTA MTA

SLIDE 3

D. Crocker

APCauce/Apricot – Kyoto, 2005 3 3

Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants Email Actors/Participants

Originator Originator Originator Originator Originator Originator Originator Originator Sender Sender Sender Sender Sender Sender Sender Sender Recipient Recipient Recipient Recipient Recipient Recipient Recipient Recipient Delivery Delivery Delivery Delivery Delivery Delivery Delivery Delivery Agent Agent Agent Agent Agent Agent Agent Agent Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay Relay

! ! Which actor/participant is Which actor/participant is being evaluated? being evaluated? ! ! Which actor/participant is Which actor/participant is vouching for them? vouching for them?

Bounce Bounce Bounce Bounce Bounce Bounce Bounce Bounce

SLIDE 4

D. Crocker

APCauce/Apricot – Kyoto, 2005 4 4

What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover What we will cover

Challenge

" Different email actors

Different email actors Different email actors Different email actors

# Each might create problems # Each might prevent problems

" Goal

Goal Goal Goal

# Identify actors # Evaluate their legitimacy # Decide whether to trust their

message traffic

Challenge

" Different email actors

Different email actors Different email actors Different email actors

# Each might create problems # Each might prevent problems

" Goal

Goal Goal Goal

# Identify actors # Evaluate their legitimacy # Decide whether to trust their

message traffic

Proposals

" Path Registration

Path Registration Path Registration Path Registration Meng Wong

# SPF # Sender-ID

" Crypto Message Authentication

Crypto Message Authentication Crypto Message Authentication Crypto Message Authentication Jim Fenton

# Identified Internet Mail (IIM) # DomainKeys

" Handling Service Support

Handling Service Support Handling Service Support Handling Service Support Dave Crocker

# Certified Server Validation (CSV) # Bounce Address Tag Validation

(BATV)

Proposals

" Path Registration

Path Registration Path Registration Path Registration Meng Wong

# SPF # Sender-ID

" Crypto Message Authentication

Crypto Message Authentication Crypto Message Authentication Crypto Message Authentication Jim Fenton

# Identified Internet Mail (IIM) # DomainKeys

" Handling Service Support

Handling Service Support Handling Service Support Handling Service Support Dave Crocker

# Certified Server Validation (CSV) # Bounce Address Tag Validation

(BATV)

SLIDE 5

D. Crocker

APCauce/Apricot – Kyoto, 2005 5 5

Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal Universal spam solution rebuttal

Checkbox form-letter for responding to spam solutions proposals. See: <http://craphound.com/spamsolutions.txt>

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based ( ) vigilante

based ( ) vigilante based ( ) vigilante based ( ) vigilante approach to fighting spam. approach to fighting spam. approach to fighting spam. approach to fighting spam. Your idea will not work. Here is why it won't work. Your idea will not work. Here is why it won't work. Your idea will not work. Here is why it won't work. Your idea will not work. Here is why it won't work. (One or more of the following may apply to your particular idea, (One or more of the following may apply to your particular idea, (One or more of the following may apply to your particular idea, (One or more of the following may apply to your particular idea, and it and it and it and it may have other flaws which used to vary from state to state befo may have other flaws which used to vary from state to state befo may have other flaws which used to vary from state to state befo may have other flaws which used to vary from state to state before a re a re a re a bad federal law was passed.) bad federal law was passed.) bad federal law was passed.) bad federal law was passed.)… … … … Checkbox form-letter for responding to spam solutions proposals. See: <http://craphound.com/spamsolutions.txt <http://craphound.com/spamsolutions.txt>

> > > > > > >

Your post advocates a Your post advocates a Your post advocates a Your post advocates a ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market ( ) technical ( ) legislative ( ) market-

based ( ) vigilante

based ( ) vigilante based ( ) vigilante based ( ) vigilante based ( ) vigilante based ( ) vigilante based ( ) vigilante based ( ) vigilante approach to fighting spam. approach to fighting spam. approach to fighting spam. approach to fighting spam. Your idea will not work. Here is why it won't work. Your idea will not work. Here is why it won't work. Your idea will not work. Here is why it won't work. Your idea will not work. Here is why it won't work. (One or more of the following may apply to your particular idea, (One or more of the following may apply to your particular idea, (One or more of the following may apply to your particular idea, (One or more of the following may apply to your particular idea, and it and it and it and it may have other flaws which used to vary from state to state befo may have other flaws which used to vary from state to state befo may have other flaws which used to vary from state to state befo may have other flaws which used to vary from state to state before a re a re a re a bad federal law was passed.) bad federal law was passed.) bad federal law was passed.) bad federal law was passed.)… … … …