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Re: [Endymail] spam versus cleartext

"John Levine" <johnl@taugh.com> Sun, 07 September 2014 16:40 UTC

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Date: 7 Sep 2014 16:40:25 -0000
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From: "John Levine" <johnl@taugh.com>
To: endymail@ietf.org
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Cc: dcrocker@gmail.com
Subject: Re: [Endymail] spam versus cleartext
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>I've no idea what characteristics of 'transactional mail' -- as compared
>with... personal mail, or ? -- worth distinguishing.

It only goes in one direction.  My bank writes to me all the time, but
I never write back.  This rules out any approach that uses an exchange
of messages to establish mutual trust.  

An obvious kludge would be some way for the bank to send you their key
out of band, analogous to the notes on websites now that say please
add our address notify@bigbank.ru to your address book.

R's,
John

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