qmailctl - built-in utility to control Qmail

There is a built-in utility to control Qmail called qmailctl. LifeWithQmail will put the file in /usr/bin/qmailctl.

Usage:
# /usr/bin/qmailctl { start | stop | restart | doqueue | flush | reload | stat | pause | cont | cdb | queue | help }

where
stop -- stops mail service (smtp connections refused, nothing goes out)
start -- starts mail service (smtp connection accepted, mail can go out)
pause -- temporarily stops mail service (connections accepted, nothing leaves)
cont -- continues paused mail service
stat -- displays status of mail service
cdb -- rebuild the tcpserver cdb file for smtp
restart -- stops and restarts smtp, sends qmail-send a TERM & restarts it
doqueue -- schedules queued messages for immediate delivery
reload -- sends qmail-send HUP, rereading locals and virtualdomains
queue -- shows status of queue
alrm -- same as doqueue
flush -- same as doqueue
hup -- same as reload

To manually shutdown the qmail processes.  Kill qmail-send first.  (qmail-send is the parent qmail process) (check for
and kill any qmail-lspawn processes that remain after a while). This stops outbound email, and stops the queue being processed.

Kill the tcpserver process providing qmail-smtpd access.  This stops incoming email from being queued.

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If you are using Debian you might try shutting down qmail via the
standard debian method (as root):

/etc/init.d/qmail stop
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