qmail can survive with just one control file, me, containing the fully-qualified name of the current host. This file is used as the default for other hostname-related control files.
Comments are allowed in badhelo, badmailfrom, badmailfromnorelay, badmailto, badmailtonorelay, locals, percenthack, qmqpservers, rcpthosts, smtproutes, and virtualdomains. Trailing spaces and tabs are allowed in any control file.
The following table lists all control files other than me. See the corresponding man pages for further details.
control defaultused by badhelo (none)qmail-smtpd badmailfrom(none)qmail-smtpd badmailfromnorelay(none)qmail-smtpd badmailto (none)qmail-smtpd badmailtonorelay(none)qmail-smtpd bouncefromMAILER-DAEMONqmail-send bouncehostmeqmail-send clientca.pem(none)qmail-smtpd clientcert.pem(none)qmail-remote concurrencylocal10qmail-send concurrencyremote20qmail-send defaultdomainmeqmail-inject defaulthostmeqmail-inject databytes 0qmail-smtpd dh1024.pem(none)qmail-smtpd dh512.pem (none)qmail-smtpd doublebouncehostmeqmail-send doublebouncetopostmasterqmail-send envnoathostmeqmail-send helohost meqmail-remote idhost meqmail-inject localiphostmeqmail-smtpd locals meqmail-send morercpthosts(none)qmail-smtpd percenthack(none)qmail-send plusdomainmeqmail-inject qmqpservers(none)qmail-qmqpc queuelifetime604800qmail-send rcpthosts (none)qmail-smtpd rsa512.pem(none)qmail-smtpd servercert.pem(none)qmail-smtpd smtpgreetingmeqmail-smtpd smtproutes(none)qmail-remote spfbehavior 0 qmail-smtpd spfexp (default) qmail-smtpd spfguess (none) qmail-smtpd spfrules (none) qmail-smtpd spamt (none)qmail-smtpd timeoutconnect60qmail-remote timeoutremote1200qmail-remote timeoutsmtpd1200qmail-smtpd tlsclients(none)qmail-smtpd tlsclientciphers(none)qmail-remote tlshosts/FQDN.pem(none)qmail-remote tlsserverciphers(none)qmail-smtpd virtualdomains(none)qmail-send