echo "Hello World" | mutt -s "Test Hello World Email" myname@mydomain.com

echo "Hello World" | mail -s "Test Hello World Email" myname@mydomain.com

from=<root@server.domain.com>, size=483096, class=0, nrcpts=1, msgid=<201806051845@server.domain.com>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
to=myname@mydomain.com, ctladdr=root (0/0), delay=00:02:00, xdelay=00:00:00, mailer=relay, pri=512775, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (Message accepted for delivery)
STARTTLS=client, relay=aspmx.l.google.com., version=TLSv1/SSLv3, verify=FAIL, cipher=ECDHE-RSA-AES128-GCM-SHA256, bits=128/128
to=<myname@mydomain.com>, ctladdr=<root@server.domain.com> (0/0), delay=00:00:03, xdelay=00:00:03, mailer=esmtp, pri=603096, relay=aspmx.l.google.com. [74.125.124.27], dsn=2.0.0, stat=Sent (OK)

from=<root@server.domain.com>, size=483096, class=0, nrcpts=1, msgid=<201806051835@server.domain.com>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
to=myname@mydomain.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30006, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (Message accepted for delivery)
STARTTLS=client, relay=aspmx.l.google.com., version=TLSv1/SSLv3, verify=FAIL, cipher=AES128-SHA, bits=128/128
to=<myname@mydomain.com>, ctladdr=<root@server.domain.com> (0/0), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=120317, relay=aspmx.l.google.com. [108.177.112.27], dsn=5.0.0, stat=Service unavailable
DSN: Service unavailable
Losing ./: savemail panic
SYSERR(root): savemail: cannot save rejected email anywhere

DSN: Service unavailable

SYSERR(root): savemail: cannot save rejected email anywhere