LionGate,
Qmail and Sendmail are already co-existing on your system, with sendmail (for example) being used to send root notifications.
Installing OpenEMM should suffice.
In that scenario, Plesk would be using Qmail and OpenEMM would be using sendmail.
That is all! (I presume)
Kind regards
If only it were that simple. When I try to start OpenEMM I get the following:
$ bin/openemm.sh start
Start /home/openemm/bin/scripts/bav-update.py .. done.
Start /home/openemm/bin/scripts/bav-trigger.py .. done.
Start /home/openemm/bin/scripts/bavd.py .. done.
Start /home/openemm/bin/bav -L INFO .. done.
Start python /home/openemm/bin/scripts/recovery.py .. done.
Start /home/openemm/bin/scripts/update.py account bounce .. done.
Start /home/openemm/bin/scripts/pickdist.py .. done.
Stopping obsolete sendmail processes: done.
Starting sendmails: listener mail queues sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
ADMIN sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
QUEUE sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
MIDQUEUE sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
SLOWQUEUE sendmail: illegal option -- q
sendmail: usage: sendmail [ -t ] [ -fsender ] [ -Fname ] [ -bp ] [ -bs ] [ arg ... ]
done.
Start /home/openemm/bin/scripts/slrtscn.py .. done.
Starting up Tomcat ......
Check Java installation :OK
Check Tomcat installation :OK
Using CATALINA_BASE: /home/openemm
Using CATALINA_HOME: /opt/openemm/tomcat
Using CATALINA_TMPDIR: /home/openemm/temp
Using JRE_HOME: /opt/openemm/java
Using CLASSPATH: /opt/openemm/tomcat/bin/bootstrap.jar