Sorry John, I misunderstood your post.
I'm not too useful with Linux at the moment (I'm a Windows refugee) so I'm not too sure of the format for an input file to zmprov. However, this will do what you want form a console window:
Code:
zmprov mcf zimbraMtaRestriction reject_invalid_hostname \
zimbraMtaRestriction reject_non-fqdn_hostname \
zimbraMtaRestriction reject_non_fqdn_sender \
zimbraMtaRestriction "reject_rbl_client dnsbl.njabl.org" \
zimbraMtaRestriction "reject_rbl_client opm.blitzed.org" \
zimbraMtaRestriction "reject_rbl_client relays.ordb.org" \
zimbraMtaRestriction "reject_rbl_client cbl.abuseat.org" \
zimbraMtaRestriction "reject_rbl_client bl.spamcop.net" \
zimbraMtaRestriction "reject_rbl_client dnsbl.sorbs.net"
Obviously modify it for your requirements and hit enter when you've copied/pasted that text. Hopefully someone more intelligent than me will show you the correct method of inputting that from a file.