nobody73:
> > My guess is you've configured the mail client to use the deprecated
> > smtps wrappermode TLS. Many mail clients improperly refer to this
> > mode as "SSL".
> 
> I had wrappermode on port 465 ,looking at master.cf ,and i disabled it
> setting it to NO.
> these the logs after change:
> 
> Jul 20 23:18:35 frozenstar postfix/smtpd[12805]: connect from
> xxx.yyyyyyyy.zzz[11.22.11.22]
> Jul 20 23:20:26 frozenstar postfix/smtpd[12805]: lost connection after
> UNKNOWN from xxx.yyyyyyyy.zzz[11.22.11.22]
> Jul 20 23:20:26 frozenstar postfix/smtpd[12805]: disconnect from
> xxx.yyyyyyyy.zzz[11.22.11.22]
> 
> There's the 'UNKNOWN' bit to sort out !

How do you know that the client connects to port 465?

Postfix should log postfix/smtps/smtpd if it connects to port 465.
Current Postfix master.cf files have:

    smtp      inet  n       -       n       -       -       smtpd
        ...
    submission inet n       -       n       -       -       smtpd
      -o syslog_name=postfix/submission
        ...
    smtps     inet  n       -       n       -       -       smtpd
      -o syslog_name=postfix/smtps
      -o smtpd_tls_wrappermode=yes
        ...

This is meant to make trouble shooting easier.

        Wietse

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