Renew expired cyrus IMAPd on April 1st

This is the command I used (as root) to renew my imap server certicates:

/etc/pki/tls/certs/renew-dummy-cert /etc/pki/cyrus-imapd/cyrus-imapd.pem

To check the date:

openssl x509 -enddate -in cyrus-imapd.pem