TMD smtp send issue

An error occurred while sending mail. - Hide Notification
4/2/2019 5:24 PM (GMT-04:00): A message could not be sent from your mail queue. This is usually because your SMTP server is not set up for relaying. You can permanently delete this message and remove it from the queue by clicking here. If you cannot send any mail, try running through the FogBugz diagnostics at (your FogBugz install)/diagnostics.asp.

Error:
Message could not be sent.
Connection closed

Headers from the email:
X-Sender: "[email protected]" <[email protected]>
X-Receiver: "[email protected]" <[email protected]>
Date: Tue, 02 Apr 2019 17:17:02 -04:00
From: "[email protected]" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: FogBugz (Case 6237) DM Designer - make the "time to look for EthernetI/O Slaves" user configurable
Precedence: junk
Content-Type: text/plain; charset=Windows-1252
Content-Transfer-Encoding: quoted-printable

An error occurred while sending mail. - Hide Notification
4/2/2019 5:32 PM (GMT-04:00): A message could not be sent from your mail queue. This is usually because your SMTP server is not set up for relaying. You can permanently delete this message and remove it from the queue by clicking here. If you cannot send any mail, try running through the FogBugz diagnostics at (your FogBugz install)/diagnostics.asp.

Error:
Message could not be sent.
Connection closed

Headers from the email:
X-Sender: "[email protected]" <[email protected]>
X-Receiver: "[email protected]" <[email protected]>
Date: Tue, 02 Apr 2019 17:23:44 -04:00
From: "[email protected]" <[email protected]>
To: "[email protected]" <[email protected]>
Subject: FogBugz (Case 6236) DM Designer - Dump file from ATU via Greg in 2.3.2
Precedence: junk
Content-Type: text/plain; charset=Windows-1252
Content-Transfer-Encoding: quoted-printable