sendmail mqueue-client folder snowballs
i currently have 13000+ files sitting in /var/spool/mqueue-client. these files indicate snowballing failures in sending a message. the original message was from smmsp (the mailer daemon) to root@localhost to report a failure in mime8to7. when that failed, the mailer daemon wanted to send a message back to smmsp to note that the delivery had failed. when that failed, it tried to send a message to postmaster. from there on, it kept trying to send stuff back and forth to indicate a message had failed delivery.
why didn't sendmail stop trying to send these messages? i want sendmail to drop any message on the floor when it sees a recipient it doesn't recognize. how do i configure this?
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I would imagine that Sendmail simply doesn't realize that it's delivering messages to itself. This could be an inherent Sendmail problem, or something in your configuration that prevents it from knowing this. I would also imagine that anyone who is going to diagnose this will need to see mail headers and/or mail log entries.