[Ach] Statistics/Surveys of smtps/starttls support

[Sebastian]

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Hi,

In our paper we state that bad encryption is still better than no
encryption (in the mail world), so TLS for incoming mails (smtpd) is not
mandatory and the ciphers are not constrained. There are many websites
and blogs out there which recommend the opposite, mandatory TLS for
incoming and modifying the cipher suite. To emphasize and justify this
recommendation as also to be able to reevaluate the standpoint I think
we should *refer to and cite statistics and surveys of smtps and
starttls support*.

What recent surveys do you know we could refer to in the document, or
discuss it's results here. I'm quite sure there has been posted a link
to one in the past, but after the revealing of the last year there have
been are hopefully some changes.

Sebastian

- -- 
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