Article ID: 124546, created on Feb 24, 2015, last review on May 12, 2016

  • Applies to:
  • Plesk 12.5 for Linux
  • Plesk 12.0 for Linux
  • Plesk 11.0 for Linux
  • Plesk 11.5 for Linux


Unable to send emails using Postfix, getting the following error in /var/log/maillog:

hostname postfix/smtp[27827]: connect to[]:25: Connection timed out

TCP port 25 connectivity test is successful:

# telnet 25
Connected to
Escape character is '^]'.


Postfix misconfiguration.


  1. Comment out the following parameter in the /etc/postfix/

    sender_dependent_default_transport_maps = hash:/var/spool/postfix/plesk/sdd_transport_maps
  2. Restart Postfix:

    # service postfix restart

Search Words

email queue

receiving mail

Connection timed out

sending mail

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