I have installed and configured the zimbra with commercial cert. Being followed steps from some threads here, POP3/SSL is setup without any problem but not very well with SMTP/TLS. The Certs are imported correctly but when I tried to use the mail client to connect the smtp server, it
would state that the Cert. is untrusted. I found that the certificate
hierarchy is invalid. The root and intermediate chains are not
there. Only the server cert. left. Any clue for that?