Milter crashed: can't read SMFIC_RCPT reply packet header

Created:

2016-11-16 12:44:05 UTC

Modified:

2017-08-16 16:56:19 UTC

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Milter crashed: can't read SMFIC_RCPT reply packet header

Applicable to:

  • Plesk 11.x for Linux
  • Plesk 12.0 for Linux

Symptoms

Postfix milter is not working properly. ' /var/log/maillog ' contains the following message:

postfix/smtpd[3089]: warning: milter inet:127.0.0.1:12768: can't read SMFIC_RCPT reply packet header: Connection timed out

Cause

Incorrect milter protocol version.

Resolution

  1. Check ' milter_protocol ' version:

    # postconf milter_protocol
    milter_protocol = 2
  2. Change ' milter_protocol ' value to '6' in ' /etc/postfix/main.cf ' and reload Postfix:

    # postfix reload
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