Name

-d41.1

Synopsis

The -d41.1 (a.k.a. -d41) debugging switch causes sendmail to print its ordering of the queue. First it prints: 

gatherq::
        QueueLimitId = !qid← if -qI used  
        QueueLimitSender = !address← if -qS used  
        QueueLimitRecipient = !address← if -qR used

See Section 11.8.2.3 for an explanation of how the -qI, -qS, and -qR command-line switches can limit the scope of a queue run. If none of them was specified, only gatherq: is printed. The -d41.1 debugging switch is extremely handy for previewing the effect of the -qI, -qS, and -qR command-line switches. When combined with -bp (mailq), these switches limit the queue listing and thus preview the effect of a limited queue run: 

# mailq
                /var/spool/mqueues/q.2/df (1 request)
-----Q-ID----- --Size-- -----Q-Time----- ------------Sender/Recipient-----------
g7PJQTbL027814      107 Sun Aug 25 13:26 you
                 (Deferred: Connection timed out with host.domain)
                                         user@host.domain
# mailq -d41.1 -qI27814
gatherq:
        QueueLimitId = 27814
                /var/spool/mqueues/q.2/df (1 request)
-----Q-ID----- --Size-- -----Q-Time----- ------------Sender/Recipient-----------
g7PJQTbL027814      107 Sun Aug 25 13:26 you
                 (Deferred: Connection timed out with host.domain)
                                         user@host.domain

Note that you may combine debugging command-line switches with queue processing commands only if you are root. If you are not, the following error is printed and debugging is turned off: 

WARNING: Cannot use -d with -q.  Disabling debugging.

The -d41.1 debugging switch also traces the growth of the queue working ...

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