On 23/12/2019 17:59, Hector Santos wrote:
Afaik, ESMTP AUTH is the only protocol that required a double EHLO
sequence with the idea that the 2nd one may show additional capabilities
after an successful AUTH takes place.
STARTTLS is used that way also - eg. to only advertise non-encrypted
AUTH methods once wrapped in the encrption.
--
Cheers,
Jeremy
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