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Article ID: 4118, created on Mar 24, 2008, last review on May 1, 2014

  • Applies to:
  • Sphera



Mail is being rejected with "Relaying denied" error on "ruleset=check_rcpt".

For example:

Jan 5 12:38:53 sendmail[22496]: i05HcfdX022496: ruleset=check_rcpt, arg1=, relay=[IP], reject=550 5.7.1 ... Relaying denied



This error may appear In case file contains a line like the following:

# Resolve map (to check if a host exists in check_mail) Kresolve host -a -T

 explanation about this issue can be found at

"Sender addresses whose domain part cause a temporary A record lookup failure but have a valid MX record will be temporarily rejected in the default configuration."


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