Why is sendmail not working?

Question

linux

In general, I already despaired, I have been fighting for a week, reading all sorts of manuals. Unable to configure sendmail. Then I installed it
apt-get install sendmail
in /etc/hosts and added my domain (gotlib.info) and executed
sendmailconfig
in php.ini I
sendmail_path /usr/sbin/sendmail -t -i
tried to configure the relay (as it is written here ), also unsuccessfully, I don’t know what to do next
Please help. Also, tell me a way to check the sending of mail, from the console, not through php.

Answer 1

Check
# echo "Message body" | mail -s "Subject" [email protected]
See what's in the logs (/var/log/....)

Answer 2

What do the logs say? Why sendmail? can postfix be easier to deliver?