I was about to submit this:
I'm about to do a split domain migration with zimbra as primary MTA. I'd prefer to not take down my whole server with a "zmcontrol stop && zimcontrol start" when I migrate each use over time.
I guess it's one of these?
http://wiki.zimbra.com/index.php?title=Split_Domain doesn't mention it.
zimbra@zimbra:~/bin$ ls *ctl*
zmamavisdctl zmauditswatchctl zmmailboxdctl zmproxyctl zmswatchctl
zmantispamctl zmclamdctl zmmemcachedctl zmsaslauthdctl zmtlsctl
zmantivirusctl zmconvertctl zmmtaconfigctl zmspellctl zmzimletctl
zmapachectl zmloggerctl zmmtactl zmstatctl
zmarchivectl zmlogswatchctl zmnginxctl zmstorectl
... and the answer is: [No nevermind this is totally wrong, don't need to do this.]
"/opt/zimbra/bin/zmmtactl reload" which will output.
I'll add this to the wiki.