I just ran into a similar situation but caused by my error. (Let us speak no more of this...)
The point is I needed to recreate my crontab. Referring to the thread
My crontab is missing I found that one option was to reinstall zimbra. The poster with that suggestion also wrote that one could alternatively run /opt/zimbra/libexec/zmsetup.pl. But this does more than I wanted. So I looked in zmsetup.pl and I saw that it builds the new crontab in /tmp/crontab.zimbra, then installs it with
crontab -u zimbra /tmp/crontab.zimbra. Since I was sure the install on my system had gone okay, and I could trust /tmp/crontab.zimbra, I just ran that command as root.
Then to restore the default backup settings (which are missing), I ran
zmschedulebackup -D as zimbra.
In your case it's possible that the /tmp/crontab.zimbra file isn't complete so you might be better off reinstalling or running zmsetup.pl.
But you can compare to the crontab.zimbra from my system, which is similar but not identical to yours. (See below.) You're running CentOS, I'm on RHEL, you have FOSS, I have NE. Probably the only differences are in the backup section, which shouldn't exist in the FOSS edition.
Obviously I can't guarantee any of this will work for you but now maybe you have some ideas to work with, if you haven't already solved your problem.
Code:
# ZIMBRASTART -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRAEND
#
# Log pruning
#
30 2 * * * find /opt/zimbra/log/ -type f -name \*.log\* -mtime +8 -exec rm {} \; > /dev/null 2>&1
35 2 * * * find /opt/zimbra/log/ -type f -name \*.out.???????????? -mtime +8 -exec rm {} \; > /dev/null 2>&1
#
# Status logging
#
*/2 * * * * /opt/zimbra/libexec/zmstatuslog
#*/10 * * * * /opt/zimbra/libexec/zmdisklog
#
# SSL Certificate Expiration Checks
#
0 0 1 * * /opt/zimbra/libexec/zmcheckexpiredcerts -days 30 -email
#
# Backups
#
# BACKUP BEGIN
# BACKUP END
#
# crontab.ldap
#
#
#
# crontab.store
#
# Log pruning
#
30 2 * * * find /opt/zimbra/mailboxd/logs/ -type f -name \*log\* -mtime +8 -exec rm {} \; > /dev/null 2>&1
30 2 * * * find /opt/zimbra/log/ -type f -name stacktrace.\* -mtime +8 -exec rm {} \; > /dev/null 2>&1
#
# Table maintenance
#
30 1 * * 7 /opt/zimbra/libexec/zmmaintaintables >> /dev/null 2>&1
#
# Report on any database inconsistencies
#
0 23 * * 7 /opt/zimbra/libexec/zmdbintegrityreport -m
#
# Monitor for multiple mysqld to prevent corruption
#
*/5 * * * * /opt/zimbra/libexec/zmcheckduplicatemysqld -e > /dev/null 2>&1
#
# Check zimbraVersionCheckURL for new update.
# Only runs if this server matches zimbraVersionCheckServer
# Only executes on zimbraVersionCheckInterval. min 2h interval
#
18 */2 * * * /opt/zimbra/libexec/zmcheckversion -c >> /dev/null 2>&1
#
# crontab.logger
#
# process logs
#
00,10,20,30,40,50 * * * * /opt/zimbra/libexec/zmlogprocess > /tmp/logprocess.out 2>&1
#
# Graph generation
#
#10 * * * * /opt/zimbra/libexec/zmgengraphs >> /tmp/gengraphs.out 2>&1
#
# Daily reports
#
30 23 * * * /opt/zimbra/libexec/zmdailyreport -m
#
# crontab.mta
#
#
# Queue logging
#
0,10,20,30,40,50 * * * * /opt/zimbra/libexec/zmqueuelog
#
# Spam training
#
0 23 * * * /opt/zimbra/bin/zmtrainsa >> /opt/zimbra/log/spamtrain.log 2>&1
#
# Spam training cleanup
#
45 23 * * * /opt/zimbra/bin/zmtrainsa --cleanup >> /opt/zimbra/log/spamtrain.log 2>&1
#
# Dspam cleanup
#
0 1 * * * [ -d /opt/zimbra/data/dspam/data/z/i/zimbra/zimbra.sig ] && find /opt/zimbra/data/dspam/data/z/i/zimbra/zimbra.sig/ -type f -name \*sig -mtime +7 -exec rm {} \; > /dev/null 2>&1
8 4 * * * [ -f /opt/zimbra/data/dspam/system.log ] && /opt/zimbra/dspam/bin/dspam_logrotate -a 60 -l /opt/zimbra/data/dspam/system.log
8 8 * * * [ -f /opt/zimbra/data/dspam/data/z/i/zimbra/zimbra.log ] && /opt/zimbra/dspam/bin/dspam_logrotate -a 60 -l /opt/zimbra/data/dspam/data/z/i/zimbra/zimbra.log
#
# Spam Bayes auto-expiry
#
20 23 * * * /opt/zimbra/libexec/sa-learn -p /opt/zimbra/conf/salocal.cf --dbpath /opt/zimbra/data/amavisd/.spamassassin --siteconfigpath /opt/zimbra/conf/spamassassin --force-expire --sync > /dev/null 2>&1
#
# Clean up amavisd/tmp
#
15 5,20 * * * find /opt/zimbra/data/amavisd/tmp -maxdepth 1 -type d -name 'amavis-*' -mtime +1 -exec rm -rf {} \; > /dev/null 2>&1
#
# Clean up the quarantine dir
#
0 1 * * * find /opt/zimbra/data/amavisd/quarantine -type f -mtime +7 -exec rm -f {} \; > /dev/null 2>&1
# ZIMBRAEND -- DO NOT EDIT ANYTHING BETWEEN THIS LINE AND ZIMBRASTART