mqueue(4)mqueue(4)NAMEmqueue - Contains the log file and temporary files associated with the
messages in the mail queue
SYNOPSIS
/usr/spool/mqueue
DESCRIPTION
The /usr/spool/mqueue directory contains temporary files associated
with the messages in the mail queue and may contain the log file. Tem‐
porary files have names that include the mail queue ID (MQID) of the
message for which the file was created: Data file Lock file Backup file
Queue control file Temporary control file Transcript file for session
SEE ALSO
Commands: sendmail(8)
Daemons: syslogd(8)mqueue(4)