Sendmail rejects or queues E-mails when the load is high (/var/spool/clientmqueue is occupying huge space)

Solution Verified - Updated -

Issue

  • Sendmail rejects email when load is high.
  • Sendmail queues every email.

Environment

  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7
  • Red Hat Enterprise Linux (RHEL) 8
  • Red Hat Enterprise Linux (RHEL) 9
  • Sendmail

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