IMAP PEM cert issue

Good day,
Using ISPconfig 3.0.5.4p8 on CentOS6.7 with Postfix and Dovecot.
I created an email account and when I log into Squirrelmail I get:
ERROR: Connection dropped by IMAP server.

maillog:
Nov 18 19:46:54 host dovecot: imap-login: Fatal: Can't load ssl_cert: There is no valid PEM certificate.
Nov 18 19:46:54 host dovecot: master: Error: service(imap-login): command startup failed, throttling
Nov 18 19:50:01 host postfix/smtpd[9054]: warning: cannot get RSA certificate from file /etc/postfix/smtpd.cert: disabling TLS support
Nov 18 19:50:01 host postfix/smtpd[9054]: warning: TLS library problem: 9054:error:0906D06CEM routinesEM_read_bio:no start lineem_lib.c:703:Expecting: TRUSTED CERTIFICATE:
Nov 18 19:50:01 host postfix/smtpd[9054]: warning: TLS library problem: 9054:error:140DC009:SSL routines:SSL_CTX_use_certificate_chain_fileEM lib:ssl_rsa.c:730:
Nov 18 19:50:01 host postfix/smtpd[9054]: connect from localhost[::1]
Nov 18 19:50:01 host dovecot: pop3-login: Fatal: Can't load ssl_cert: There is no valid PEM certificate.
Nov 18 19:50:01 host dovecot: imap-login: Fatal: Can't load ssl_cert: There is no valid PEM certificate.
Nov 18 19:50:01 host dovecot: master: Error: service(pop3-login): command startup failed, throttling
Nov 18 19:50:01 host dovecot: master: Error: service(imap-login): command startup failed, throttling
Nov 18 19:50:01 host postfix/smtpd[9054]: lost connection after CONNECT from localhost[::1]
Nov 18 19:50:01 host postfix/smtpd[9054]: disconnect from localhost[::1]

Thanks ahead,

JP

 

Check /etc/postfix/smtpd.cert and smtpd.key.

 

They are there. Should I regenerate them?

 

I replaced them and it's all good now. Thank you once again.
JP