zimbra DKIM (DomainKeys identified Mail)
zimbra DKIM (Domainkeys identified Mail) include: Private-key insert header of email sending mail server. Public-key updated into DNS public. Links to below you maybe likes: zimbra custom spamassassin rules How to create auto Bcc for Recipient mails for Zimbra 8.6 How to add spam filters on zimbra 8.6 How to create auto Bcc for sender mails for Zimbra 8.6 list accounts that has not logged in for the last x days in zimbra Step 1: To configure zimbra DKIM To add DKIM data into domain not existing DKIM /opt/zimbra/libexec/zmdkimkeyutil -a -d huuphan.com The output as bellow DKIM Data added to LDAP for domain huuphan.com with selector 0E9F133A-9577-11E1-AD0E-2A2FBBAC6BCB Public key to enter into DNS: 0E9F133A-9577-11E1-AD0E-2A2FBBAC6BCB._domainkey IN TXT "v=DKIM1;=rsa; p=MIGfMA0GCXXXSSFWwfdfdfEEAA4GNADCBiQKBgQDY5CBg15nZ2vYnRmrNub6Jn6ghQ2DXQbQgOJ/E5IGziUYEuE2OnxkBm1h3jived21uHjpNy0naOZjLj0xLyyjclVy1chrhSbsGAhe8HLXUsdXyfRvNTq8NWLsUnMEsoomtJCJ /4GSWYU1whOQ9oKZ