diff --git a/Messaging/MailSender.vb b/Messaging/MailSender.vb
index 231c0ceb..e6c0f564 100644
--- a/Messaging/MailSender.vb
+++ b/Messaging/MailSender.vb
@@ -24,7 +24,9 @@ Public Class MailSender
         Public Property EnableDefault As Boolean = True
         Public Property EnableTls1_1 As Boolean = False
         Public Property EnableTls1_2 As Boolean = False
-        Public Property EnableTls1_3 As Boolean = False
+
+        ' Not available in .NET 4.6.2
+        'Public Property EnableTls1_3 As Boolean = False
     End Class
 
     Public Sub New(pLogConfig As LogConfig)
@@ -81,10 +83,11 @@ Public Class MailSender
             oSession.SSLConfiguration.EnabledSslProtocols = oSession.SSLConfiguration.EnabledSslProtocols Or Security.Authentication.SslProtocols.Tls12
         End If
 
-        If pOptions.EnableTls1_3 Then
-            Logger.Debug("Enabling TLS Version 1.3")
-            oSession.SSLConfiguration.EnabledSslProtocols = oSession.SSLConfiguration.EnabledSslProtocols Or Security.Authentication.SslProtocols.Tls13
-        End If
+        ' This is not available in .NET 4.6.2, only in .NET 4.7/4.8
+        'If pOptions.EnableTls1_3 Then
+        '    Logger.Debug("Enabling TLS Version 1.3")
+        '    oSession.SSLConfiguration.EnabledSslProtocols = oSession.SSLConfiguration.EnabledSslProtocols Or Security.Authentication.SslProtocols.Tls13
+        'End If
 
         Logger.Debug("Enabled Encryption Protocols: [{0}]", oSession.SSLConfiguration.EnabledSslProtocols)