Hi everyone, thanks for the clarifications, this is quite useful. I
have another question about TLS pipelines.

Do smtpd and smtp processes talk directly to tlsmgr process, or does
this pipeline always go through tlsproxy? Does the following diagram
accurately depict the paths?

 [smtpd]    [smtp]
    ^         |
    |         |
    \         /
     [tlsproxy]<-------->[tlsmgr]
    /         \
    |         |
    |         V
(mail in) (mail out)

Also the man page for tlsproxy states:
"It is used by the postscreen(8) server... and by the smtp(8) client"

No mention of smtpd. Does this mean that smtpd has no use for tlsproxy?
I had a look at https://www.postfix.org/TLS_README.html there is a
diagram for smtp client but not very clear where tlsproxy fits in with
smtpd. Or may be it is the same?

Thanks.
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