Remove need of SMTP.Host config when defining pickupdirectorylocation

Author: mikecp

src/Umbraco.Core/Configuration/Models/GlobalSettings.cs

@@ -157,6 +157,11 @@ public class GlobalSettings
         /// </summary>
         public bool IsSmtpServerConfigured => !string.IsNullOrWhiteSpace(Smtp?.Host);
 
+        /// <summary>
+        /// Gets a value indicating whether there is a physical pickup directory configured.
+        /// </summary>
+        public bool IsPickupDirectoryLocationConfigured => !string.IsNullOrWhiteSpace(Smtp?.PickupDirectoryLocation);
+
         /// <summary>
         /// An int value representing the time in milliseconds to lock the database for a write operation
         /// </summary>

src/Umbraco.Infrastructure/Mail/EmailSender.cs

@@ -75,15 +75,13 @@ private async Task SendAsyncInternal(EmailMessage message, string emailType, boo
                 }
             }
 
-            var isPickupDirectoryConfigured = !string.IsNullOrWhiteSpace(_globalSettings.Smtp?.PickupDirectoryLocation);
-
-            if (_globalSettings.IsSmtpServerConfigured == false && !isPickupDirectoryConfigured)
+            if (!_globalSettings.IsSmtpServerConfigured && !_globalSettings.IsPickupDirectoryLocationConfigured)
             {
                 _logger.LogDebug("Could not send email for {Subject}. It was not handled by a notification handler and there is no SMTP configured.", message.Subject);
                 return;
             }
 
-            if (isPickupDirectoryConfigured && !string.IsNullOrWhiteSpace(_globalSettings.Smtp?.From))
+            if (_globalSettings.IsPickupDirectoryLocationConfigured && !string.IsNullOrWhiteSpace(_globalSettings.Smtp?.From))
             {
             // The following code snippet is the recommended way to handle PickupDirectoryLocation. 
             // See more https://github.com/jstedfast/MailKit/blob/master/FAQ.md#q-how-can-i-send-email-to-a-specifiedpickupdirectory
@@ -154,7 +152,10 @@ await client.ConnectAsync(_globalSettings.Smtp.Host,
         /// </summary>
         /// <remarks>
         /// We assume this is possible if either an event handler is registered or an smtp server is configured
+        /// or a pickup directory location is configured
         /// </remarks>
-        public bool CanSendRequiredEmail() => _globalSettings.IsSmtpServerConfigured || _notificationHandlerRegistered;
+        public bool CanSendRequiredEmail() => _globalSettings.IsSmtpServerConfigured
+                                              || _globalSettings.IsPickupDirectoryLocationConfigured
+                                              || _notificationHandlerRegistered;
     }
 }