(still) problems with email/ssl and t-online.de/telekom.de

[Johannes-Maria Kaltenbach]

Hello,

another part of the problem solved:
I'm now able to reach securesmtp.t-online.de (alias sfwdallmx.t-online.de)
with sendmail + relay,
but can't send any messages due to problems with authentication:

latest from /var/log/maillog:

| sendmail[29442]: s2SE7gPf029442: from=jmk, size=51, class=0, nrcpts=1, \
|  msgid=<201403281407.s2SE7gPf029442 at jmk.org>, relay=root at localhost
| sendmail[29442]: STARTTLS=client, relay=sfwdallmx.t-online.de., \
|  version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-AES256-GCM-SHA384, \
|  bits=256/256
| sendmail[29442]: s2SE7gPf029442: to=johannes-maria at t-online.de, \
|  ctladdr=jmk (1001/1001), delay=00:00:09, xdelay=00:00:09, mailer=relay, \
|  pri=30051, relay=sfwdallmx.t-online.de. [194.25.134.46], dsn=5.0.0, \
|  stat=Service unavailable
| sendmail[29442]: s2SE7gPf029442: s2SE7gPg029442: DSN: Service unavailable
| sm-mta[29444]: s2SE7pSo029444: from=<>, size=1907, class=0, nrcpts=1, \
|  msgid=..., proto=ESMTP, daemon=IPv4, relay=localhost [127.0.0.1]
| sendmail[29442]: s2SE7gPg029442: to=jmk, delay=00:00:02, xdelay=00:00:02, \
|  mailer=relay, pri=31075, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, \
|  stat=Sent (s2SE7pSo029444 Message accepted for delivery)

and the mail delivery system returns the mail to me with the message

  530 5.7.0 Authentication required.
  554 5.0.0 Service unavailable
  (while talking to sfwdallmx.t-online.de)


I created a certificate with make cert in /usr/ports/security/stunnel
when I installed stunnel (as adviced in the pkg-message); the certificate
is stored in /usr/local/etc/stunnel.
And in stunnel.log I find:
| Loading cert from file: /usr/local/etc/stunnel/stunnel.pem


What is wrong and what else should I do for proper authentication?


Thanks,
Johannes-Maria