mailserver (Postfix+Dovecot)

Thu, 07/11/2013 - 16:17

Howtos,-Procmail,-Dovecot-und-Postfix.html | sieht gut aus | sasl howto THE BEST OF THE BEST OF ALL: ACHTUNG THUNDERBIRD: (siehe punkt 5) Drupal Multiple


Postfix soll performant sein.


Oreilley - Postfix Book of Postfix, by Ralph Hildebrandt



  1. apt-get install postfix
  2. aptitude install dnsutils
dnsutils sind untilities für lookup dns kram. Internet Site wählen und hostname (hier nano /etc/postfix/ Changes
  1. #fooling idiots trying to access server :P
  2. smtpd_banner = $myhostname ESMTP Exchange Server 2003 (Microsoft Windows 2003)

Test with Telnet
  1. telnet 25
  2. HELO
  3. MAIL FROM:<>
  4. DATA
  5. Subject: foo
  6. Bodytext
  7. . (ja genau . eingeben und enter)
  8. QUIT

Submission-Port 587

Security tests


Mailserver prüfen ob die Domain existiert usw. Beispiele für fehlschlag Dazu siehe mail.log file
  1. Nov 20 15:28:23 artwaves postfix/smtp[2854]: 0D33B101F8: to=<>,[]:25, delay=85299, delays=85297/0.34/0.58/0.56, dsn=4.1.8, status=deferred (host[] said: 450 4.1.8 <>: Sender address rejected: Domain not found (in reply to RCPT TO command))
  3. Nov 19 16:08:23 artwaves postfix/smtp[6400]: 811DF10204: to=<>,[]:25, delay=0.36, delays=0/0/0.23/0.13, dsn=4.2.0, status=deferred (host[] said: 450 4.2.0 <>: Recipient address rejected: Greylisted, see (in reply to RCPT TO command))
  5. Nov 19 16:08:19 artwaves postfix/smtp[6400]: 4A55D10202: to=<>,[]:25, delay=21, delays=20/0/0.23/0.29, dsn=5.7.1, status=bounced (host[] said: 550 5.7.1 <>: Recipient address rejected: Mail appeared to be SPAM or forged. Ask your Mail/DNS-Administrator to correct HELO and DNS MX settings or to get removed from DNSBLs; MTA helo:, MTA hostname:[] (helo/hostname mismatch) (in reply to RCPT TO command))
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