email versenden via Outlook funktioniert nicht

[renew]

Hallo,
Ich habe ein Problem mit dem versenden von emails via. Outlook (und anderen). Per webmailer funktioniert alles wunderbar aber sobald ich probiere mit einer Software einen email-konto einzurichten schlägt hier der emailversand (SMTP) fehl. Ich denke ich habe alles richtig gemacht:
Als POP3 und SMTP habe ich zwei varianten versucht: mail.domain.tld (natürlich mit der richtigen Domain) und 46.182.19.127 (IP des vservers)

*requires authentication (SMTP) -> Benutze gleiche settings wie incoming mail server

Die Fehlermeldung in Outlook ist immer die selbe:
Send test e-mail message: The connection to the server was interrupted. If this problem continues, contact your server administrator or Internet service provider (ISP).

Technische Daten:
vServer - Debian 5.0 + ISPCP 1.0.0 - 64 Bit
ispCP 1.0.0 OMEGA, build: 20090225, Codename: Priamos (vorinstalliert vom Provider nbiServ)

Logs:
mail.log

Code:

Feb 21 08:32:01 vadmin683 postfix/smtpd[5859]: lost connection after RCPT from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:32:01 vadmin683 postfix/smtpd[5859]: disconnect from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:33:51 vadmin683 pop3d: Connection, ip=[::ffff:84.56.60.43]
Feb 21 08:33:51 vadmin683 pop3d: LOGIN FAILED, user=haefner@n4design.de, ip=[::ffff:84.56.60.43]
Feb 21 08:33:57 vadmin683 pop3d: Disconnected, ip=[::ffff:84.56.60.43]
Feb 21 08:35:21 vadmin683 postfix/anvil[5860]: statistics: max connection rate 1/60s for (smtp:93.231.156.160) at Feb 21 08:32:01
Feb 21 08:35:21 vadmin683 postfix/anvil[5860]: statistics: max connection count 1 for (smtp:93.231.156.160) at Feb 21 08:32:01
Feb 21 08:35:21 vadmin683 postfix/anvil[5860]: statistics: max cache size 1 at Feb 21 08:32:01
Feb 21 08:37:48 vadmin683 pop3d: Connection, ip=[::ffff:80.187.100.100]
Feb 21 08:37:48 vadmin683 pop3d: LOGIN, user=info@hno-zeller.de, ip=[::ffff:80.187.100.100], port=[42540]
Feb 21 08:37:49 vadmin683 pop3d: LOGOUT, user=info@hno-zeller.de, ip=[::ffff:80.187.100.100], port=[42540], top=0, retr=0, rcvd=18, sent=47, time=1
Feb 21 08:39:31 vadmin683 pop3d: Connection, ip=[::ffff:93.231.156.160]
Feb 21 08:39:32 vadmin683 pop3d: LOGIN, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60390]
Feb 21 08:39:32 vadmin683 pop3d: LOGOUT, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60390], top=0, retr=0, rcvd=12, sent=39, time=0
Feb 21 08:39:32 vadmin683 postfix/smtpd[5875]: connect from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:39:32 vadmin683 postfix/smtpd[5875]: NOQUEUE: reject: RCPT from p5DE79CA0.dip.t-dialin.net[93.231.156.160]: 504 5.5.2 <PCPC>: Helo command rejected: need fully-qualified hostname; from=<test@hno-zeller.de> to=<test@hno-zeller.de> proto=ESMTP helo=<PCPC>
Feb 21 08:39:32 vadmin683 postfix/smtpd[5875]: lost connection after RCPT from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:39:32 vadmin683 postfix/smtpd[5875]: disconnect from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:39:41 vadmin683 pop3d: Connection, ip=[::ffff:93.231.156.160]
Feb 21 08:39:41 vadmin683 pop3d: LOGIN, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60392]
Feb 21 08:39:42 vadmin683 pop3d: LOGOUT, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60392], top=0, retr=0, rcvd=12, sent=39, time=1
Feb 21 08:39:42 vadmin683 postfix/smtpd[5875]: connect from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:39:42 vadmin683 postfix/smtpd[5875]: warning: p5DE79CA0.dip.t-dialin.net[93.231.156.160]: SASL NTLM authentication aborted
Feb 21 08:39:42 vadmin683 postfix/smtpd[5875]: warning: SASL authentication failure: required parameters missing
Feb 21 08:39:42 vadmin683 postfix/master[5741]: warning: process /usr/lib/postfix/smtpd pid 5875 killed by signal 11
Feb 21 08:40:02 vadmin683 pop3d: Connection, ip=[::ffff:93.231.156.160]
Feb 21 08:40:02 vadmin683 pop3d: LOGIN, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60396]
Feb 21 08:40:02 vadmin683 pop3d: LOGOUT, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60396], top=0, retr=0, rcvd=12, sent=39, time=0
Feb 21 08:40:02 vadmin683 postfix/smtpd[5882]: connect from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:40:03 vadmin683 postfix/smtpd[5882]: warning: p5DE79CA0.dip.t-dialin.net[93.231.156.160]: SASL NTLM authentication aborted
Feb 21 08:40:03 vadmin683 postfix/smtpd[5882]: warning: SASL authentication failure: required parameters missing
Feb 21 08:40:03 vadmin683 postfix/master[5741]: warning: process /usr/lib/postfix/smtpd pid 5882 killed by signal 11
Feb 21 08:40:03 vadmin683 postfix/master[5741]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
Feb 21 08:41:43 vadmin683 postfix/anvil[5876]: statistics: max connection rate 3/60s for (smtp:93.231.156.160) at Feb 21 08:40:02
Feb 21 08:41:43 vadmin683 postfix/anvil[5876]: statistics: max connection count 1 for (smtp:93.231.156.160) at Feb 21 08:39:32
Feb 21 08:41:43 vadmin683 postfix/anvil[5876]: statistics: max cache size 1 at Feb 21 08:39:32
Feb 21 08:51:37 vadmin683 pop3d: Connection, ip=[::ffff:93.231.156.160]
Feb 21 08:51:37 vadmin683 pop3d: LOGIN, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60555]
Feb 21 08:51:37 vadmin683 pop3d: LOGOUT, user=test@hno-zeller.de, ip=[::ffff:93.231.156.160], port=[60555], top=0, retr=0, rcvd=12, sent=39, time=0
Feb 21 08:51:37 vadmin683 postfix/smtpd[5889]: connect from p5DE79CA0.dip.t-dialin.net[93.231.156.160]
Feb 21 08:51:38 vadmin683 postfix/smtpd[5889]: warning: p5DE79CA0.dip.t-dialin.net[93.231.156.160]: SASL NTLM authentication aborted
Feb 21 08:51:38 vadmin683 postfix/smtpd[5889]: warning: SASL authentication failure: required parameters missing
Feb 21 08:51:38 vadmin683 postfix/master[5741]: warning: process /usr/lib/postfix/smtpd pid 5889 killed by signal 11
Feb 21 08:51:38 vadmin683 postfix/master[5741]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
Feb 21 08:53:18 vadmin683 postfix/anvil[5890]: statistics: max connection rate 1/60s for (smtp:93.231.156.160) at Feb 21 08:51:37
Feb 21 08:53:18 vadmin683 postfix/anvil[5890]: statistics: max connection count 1 for (smtp:93.231.156.160) at Feb 21 08:51:37
Feb 21 08:53:18 vadmin683 postfix/anvil[5890]: statistics: max cache size 1 at Feb 21 08:51:37

die mail.err ist leer.

Weiß einer wo hier der Fehler liegt?

Viele Grüße,
Rene