On 11 Jun 2021, at 09:15, Linda Pagillo <lpad...@gmail.com> wrote:
465     inet  n       -       n       -       -       smtpd
  -o syslog_name=postfix/smtps
  -o smtpd_tls_wrappermode=yes

On 13.06.21 06:40, @lbutlr wrote:
This is incorrect. 465 should be set without a STARTTLS wrapper

it's not starttls wrapper, it's without-startls wrapper:

smtpd_tls_wrappermode (default: no)

   Run the Postfix SMTP server in the non-standard "wrapper" mode, instead
   of using the STARTTLS command.

  -o smtpd_tls_security_level=encrypt

...this is useless in wrapper mode:

smtpd_tls_security_level (default: empty)

   The SMTP TLS security level for the Postfix SMTP server; when a
   non-empty value is specified, this overrides the obsolete parameters
   smtpd_use_tls and smtpd_enforce_tls.  This parameter is ignored with
   "smtpd_tls_wrappermode = yes".


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