Internet and e-mail policy and practice
including Notes on Internet E-mail


2014
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Home :: Email

16 Jul 2014

The mail forwarding threat model Email
The recent
DMARC kerfluffle has brought new attention to mail forwarders that send mail on behalf of other people. We've been giving a lot of thought to ways to tell nice forwarders from nasty ones, so that mail systems can deliver mail from the nice ones and filter the nasty ones. It occurs to me that there are several scenarios for the way that forwarders work, so I've collected them in a little chart.

See more ...


posted at: 19:42 :: permanent link to this entry :: 0 comments
Trackback link is http://jl.ly/Email/fwdthreat.trackback

03 Jun 2014

Dealing with DMARC Email

DMARC is an anti-phishing scheme that was repurposed in April to try to deal with the fallout from security breaches at AOL and Yahoo. A side effect of AOL and Yahoo's actions is that a variety of bad things happen to mail that has From: addresses at aol.com or yahoo.com, but wasn't sent from AOL or Yahoo's own mail systems. If the mail is phish or spam, that's good, but when it's mailing lists or a newspaper's mail-an-article, it's no so good.

The mailing list community has been gnashing its teeth for the past month trying to figure out the least bad ways to deal with the problem.

To keep track of all the ways of avoiding or limiting the damage, I've made a page on the ASRG wiki. (The ASRG is gone, but the wiki lives on.)

If I've missed anything, let me know and I'll update it.


posted at: 23:26 :: permanent link to this entry :: 0 comments
Trackback link is http://jl.ly/Email/undmarc.trackback

28 Apr 2014

A helpful tip for AOL users Email
AOL finally
confirmed today that crooks have stolen credentials and address books from some large number of AOL users. (They say 2%, but that's only the ones they know about so far.) So we suggest you take some routine security precautions.

See more ...


posted at: 21:57 :: permanent link to this entry :: 0 comments
Trackback link is http://jl.ly/Email/aolchange.trackback

23 Apr 2014

AOL has a security hole, and it's our problem Email
Two weeks ago I wrote about
Yahoo's unfortunate mail security actions. Now it's AOL's turn, and the story, as best as I can piece it together, is not pretty.

See more ...


posted at: 23:33 :: permanent link to this entry :: 1 comments
Trackback link is http://jl.ly/Email/aoldmarc.trackback

07 Apr 2014

Yahoo addresses a security problem by breaking every mailing list in the world Email
DMARC is what one might call an emerging e-mail security scheme. It's emerging pretty fast, since many of the largest mail systems in the world have already implemented it, including Gmail, Hotmail/MSN/Outlook, Comcast, and Yahoo.

See more ...


posted at: 20:14 :: permanent link to this entry :: 8 comments
Trackback link is http://jl.ly/Email/yahoobomb.trackback

Topics


My other sites

Who is this guy?

Airline ticket info

Taughannock Networks

Other blogs

CAUCE
CASL Comes into Force
31 days ago

A keen grasp of the obvious
Applying the Hobby Lobby decision
28 days ago

Related sites

Coalition Against Unsolicited Commercial E-mail

Network Abuse Clearinghouse



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