Instead of "doveconf -n", appended below /etc/dovecot/dovecot.conf

Protocols we want to be serving.

protocols = imap pop3 lmtp Z <== have tried this earlier, no luck

protocols = imap pop3 imaps pop3s

protocols = imaps pop3s

ssl_disable = no <==added later but I don't need Secure POP3 actually ssl_cert_file = /usr/share/ssl/certs/dovecot.pem <==added later but I don't need Secure POP3 ssl_key_file = /usr/share/ssl/private/dovecot.pem <==added later but I don't need Secure POP3

listen = *

#base_dir = /var/run/dovecot/ #login_trusted_networks = #login_access_sockets = #verbose_proctitle = no #shutdown_clients = yes #doveadm_worker_count = 0 #doveadm_socket_path = doveadm-server

"proxy::<name>".

dict { #quota = mysql:/etc/dovecot/dovecot-dict-sql.conf.ext #expire = sqlite:/etc/dovecot/dovecot-dict-sql.conf.ext }

!include conf.d/*.conf

#!include_try /etc/dovecot/local.conf