Postfix error send mail????

Question

linux

Need help, need to raise postfix to send message
Tested but
Error occurred
logs:
Jul 9 16:07:49 bdodrk postfix[15689]: To disable backwards compatibility use "p ostconf compatibility_level=2" and "postfix reload"
Jul 9 16 :07:50 bdodrk postfix/master[15726]: fatal: bind 127.0.0.1 port 25: Address already in use
Jul 9 16:25:00 bdodrk postfix[16106]: Postfix is ​​running with backwards-compati ble default settings
Jul 9 16:25:00 bdodrk postfix[16106]: See www.postfix.org/COMPATIBILITY_README.html for details
Jul 9 16:25:00 bdodrk postfix[16106]: To disable backwards compatibility use "p ostconf compatibility_level=2" and "postfix reload"
Jul 9 16:25:00 bdodrk postfix/master[16143]: fatal: bind 127.0.0.1 port 25: Add ress already in use
Jul 9 16:25:14 bdodrk postfix[16150]: error: to submit mail, use the Postfix se ndmail command
Jul 9 16:25:14 bdodrk postfix[16150]: fatal: the postfix command is reserved for r the superuser
Jul 9 16:25:24 bdodrk postfix[16151]: error: to submit mail, use the Postfix se ndmail command
Jul 9 16:25:24 bdodrk postfix[16151]: fatal: the postfix command is reserved for r the superuser

Answer 1

port 25 is busy with something else. see what else is using the port.
netstat -a