mailx  -a /opt/script/log/status.log  -S smtp=flrsmtp.menarini.net -r
"test@gmail.com" -s "$HOSTNAME critical_subject " -v "mymail@gmail.com" << EOF
Critical Status found during the Monitoring and Control Operation. Please
check the Attach Log.
EOF

Resolving host [..] . . . done.
Connecting to [..]:smtp . . . connected.
220 [..] ESMTP Wed, 02 Aug 2017 09:42:58 +0200
>>> HELO a.b.c
250 a.b.c.Hello [..]
>>> MAIL FROM:<test@gmail.com>
250 OK
>>> RCPT TO:<mymail@gmail.com>
550 relay is not permitted on this host.
smtp-server: 550 relay is not permitted on this host.
"/root/dead.letter" 102/5133
. . . message not sent.