docker container에서 메일 보내기

mail -s "Test Subject" your@gmail.com < dev/null
Null message body; hope that's ok
[root@6778acb18273 /]# send-mail: fatal: parameter inet_interfaces: no local interface found for ::1

docker run --rm --net="host" php:fpm-alpine sh -c 'echo "Subject: test" | sendmail -v your@mail.com'