postfix/smtpd[12345]: warning: support for restriction "check_relay_domains" will be removed from Postfix; use "reject_unauth_destination" instead

Solution Unverified - Updated -

Issue

  • The following warning occurred. What does this mean ?
Nov 12 12:34:56 myhost postfix/smtpd[12345]: warning: support for restriction "check_relay_domains" will be removed from Postfix; use "reject_unauth_destination" instead

Environment

  • Red Hat Enterprise Linux 6
  • postfix

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