Notlshosts/FQDN
notlshosts/FQDN
man qmail-remote excerpt:
qmail-remote will not try TLS on servers for which this file exists (FQDN is the fully-qualified domain name of the server). ([[tlshosts/FQDN.pem takes precedence over this file however).
Stop TLS encryption for a particular domain: 1) # nslookup -type=mx 'domain.tld' domain.tld mail exchanger = 0 mx.domain.tld. 2) # mkdir /var/qmail/control/notlshosts/ 3) # touch /var/qmail/control/notlshosts/mx.domain.tld