I just noticed this in SASL_README (http://www.postfix.org/SASL_README.html#client_sasl_enable):

  * The Postfix SMTP client does not support the obsolete "wrappermode"
protocol, which uses TCP port 465 on the SMTP server. See TLS_README for a
    solution that uses the stunnel command.

I believe this is out of date as wrappermode has been available for smtp for some time now and submissions is a thing now so the protocol is no longer obsolete either.


Peter

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