[dane] SMTP STARTTLS stripping in the wild

Paul Wouters <paul@nohats.ca> Thu, 13 November 2014 19:59 UTC

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Date: Thu, 13 Nov 2014 14:59:04 -0500 (EST)
From: Paul Wouters <paul@nohats.ca>
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Subject: [dane] SMTP STARTTLS stripping in the wild
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https://www.eff.org/deeplinks/2014/11/starttls-downgrade-attacks

 	"In recent months, researchers have reported ISPs in the US and Thailand
 	 intercepting their customers' data to strip a security flag—called
 	 STARTTLS—from email traffic."


Thanks to Viktor, properly configured postfix clients deployed with DANE should
detect this and refuse to send the email unencrypted.

Paul