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On Tue, 2015-06-23 at 12:27 -0500, Frank Bulk wrote:
> Is there a public list of such weak domains/MXes?

Well, I have a few from grepping my logs:

mail.ritz.edu
hawk.dcu.ie
inbound30.exchangedefender.com
smtp.raymondcorp.com
smtp1.raymondcorp.com
smtp2.raymondcorp.com
mail.axs2000.net

and on 213.199.154.87 I have seen "reject=403 4.7.0 TLS handshake
failed", followed 30 minutes later by a successful delivery. There are
possibly multiple machines behind some load balancer, and some of them
may have week keys.


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