postfix mail server not responding + connect from unknown

Yeah! I found the reason: some lines were missing in /etc/postfix/master.cf

I had to add:

149.202.114.212:smtp    inet    n   -   -   -   -   smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_cert_file=/home/bilp/ssl.cert -o smtpd_tls_key_file=/home/bilp/ssl.key
149.202.114.212:submission  inet    n   -   -   -   -   smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_cert_file=/home/bilp/ssl.cert -o smtpd_tls_key_file=/home/bilp/ssl.key

The point is: this server had been installed 6 months ago, and POSTFIX worked fine until then. I cannot understand how POSTFIX could work without those 2 lines?