Para ver configuración ./var/qmail/bin/qmail-showctl
Para ver los emails enviados simultanemanete en un momento determinado: ps -aef | grep "qmail" | wc -l
Puede contener los siguientes parametros, para establecerlos deberas crear el nombre de fichero con el nombre del parametro, y en su interior solo el valor del parametro:
| Control | Default | Used by | Purpose |
| badmailfrom | none | qmail-smtpd | blacklisted From addresses |
| bouncefrom | MAILER-DAEMON | qmail-send | username of bounce sender |
| bouncehost | me | qmail-send | hostname of bounce sender |
| concurrencyincoming | none | /service/qmail-smtpd/run | max simultaneous incoming SMTP connections |
| concurrencylocal | 10 | qmail-send | max simultaneous local deliveries |
| concurrencyremote | 20 | qmail-send | max simultaneous remote deliveries |
| defaultdelivery | none | /var/qmail/rc | default .qmail file |
| defaultdomain | me | qmail-inject | default domain name |
| defaulthost | me | qmail-inject | default host name |
| databytes | 0 | qmail-smtpd | max number of bytes in message (0=no limit) |
| doublebouncehost | me | qmail-send | host name of double bounce sender |
| doublebounceto | postmaster | qmail-send | user to receive double bounces |
| envnoathost | me | qmail-send | default domain for addresses without "@" |
| helohost | me | qmail-remote | host name used in SMTP HELO command |
| idhost | me | qmail-inject | host name for Message-ID's |
| localiphost | me | qmail-smtpd | name substituted for local IP address |
| locals | me | qmail-send | domains that we deliver locally |
| me | FQDN of system | various | default for many control files |
| morercpthosts | none | qmail-smtpd | secondary rcpthosts database |
| percenthack | none | qmail-send | domains that can use "%"-style relaying |
| plusdomain | me | qmail-inject | domain substituted for trailing "+" |
| qmqpservers | none | qmail-qmqpc | IP addresses of QMQP servers |
| queuelifetime | 604800 | qmail-send | seconds a message can remain in queue |
| rcpthosts | none | qmail-smtpd | domains that we accept mail for |
| smtpgreeting | me | qmail-smtpd | SMTP greeting message |
| smtproutes | none | qmail-remote | artificial SMTP routes |
| timeoutconnect | 60 | qmail-remote | how long, in seconds, to wait for SMTP connection |
| timeoutremote | 1200 | qmail-remote | how long, in seconds, to wait for remote server |
| timeoutsmtpd | 1200 | qmail-smtpd | how long, in seconds, to wait for SMTP client |
| virtualdomains | none | qmail-send | virtual domains and users |