 to fix port 22 thing
su - zimbra
then run
ssh-keygen -t dsa
Choose to save the generated keys at /opt/zimbra/.ssh/zimbra_identity
do not give it a password
then edit your /opt/zimbra/.ssh/authorized_keys file to use the text that is in the /opt/zimbra/.ssh/zimbra-identity.pub file. it replaces the old key text.
that will permit zimbra to run remote ssh
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