ZCS Administrator Guide 8.0
ZCS Administrator Guide 8.0
Open Source Edition

Managing Configuration > Update DKIM Data for a Domain

Update DKIM Data for a Domain
When the DKIM keys are updated, the DNS server must be reloaded with the new TXT record.
Good practice is to leave the previous TXT record in DNS for a period of time so that email messages that were signed with the previous key can still be verified.
/opt/zimbra/libexec/zmdkimkeyutil -u -d <example.com>
Optional. To specify the number of bits for the new key, include -b in the command line, -b <####>. If you do not add the -b, the default setting is 1024 bits.
/opt/zimbra/opendkim/sbin/opendkim-testkey -d <example.com> -s <0E9F184A-9577-11E1-AD0E-2A2FBBAC6BCB> -x /opt/zimbra/conf/opendkim.conf
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