Set Sitename / site email as sender for system emails

src/Core/Update.php

@@ -264,7 +264,7 @@ class Update
 			$body     = $l10n->t("The error message is\n[pre]%s[/pre]", $error_message);
 
 			$email = DI::emailer()
-			           ->newSystemMail($l10n)
+			           ->newSystemMail(DI::app(), $l10n)
 			           ->withMessage($l10n->t('[Friendica Notify] Database update'), $preamble, $body)
 			           ->forUser($admin['uid'] ?? 0)
 			           ->withRecipient($admin['email'])
@@ -300,7 +300,7 @@ class Update
 					$from_build, $to_build));
 
 				$email = DI::emailer()
-				           ->newSystemMail($l10n)
+				           ->newSystemMail(DI::app(), $l10n)
 				           ->withMessage($l10n->t('[Friendica Notify] Database update'), $preamble)
 				           ->forUser($admin['uid'] ?? 0)
 				           ->withRecipient($admin['email'])

src/Model/User.php

@@ -898,7 +898,7 @@ class User
 		));
 
 		$email = DI::emailer()
-		           ->newSystemMail(DI::l10n())
+		           ->newSystemMail(DI::app(), DI::l10n())
 		           ->withMessage(DI::l10n()->t('Registration at %s', $sitename), $body)
 		           ->forUser($user['uid'] ?? 0)
 		           ->withRecipient($user['email'])
@@ -966,7 +966,7 @@ class User
 		));
 
 		$email = DI::emailer()
-		           ->newSystemMail((!empty($user['language'])) ? DI::l10n()->withLang($user['language']) : DI::l10n())
+		           ->newSystemMail(DI::app(), $l10n)
 		           ->withMessage(DI::l10n()->t('Registration details for %s', $sitename), $preamble, $body)
 		           ->forUser($user['uid'] ?? 0)
 		           ->withRecipient($user['email'])

src/Module/Admin/Users.php

@@ -77,7 +77,7 @@ class Users extends BaseAdmin
 			$body = sprintf($body, DI::baseUrl()->get(), $user['nickname'], $result['password'], DI::config()->get('config', 'sitename'));
 
 			$email = DI::emailer()
-			           ->newSystemMail((!empty($user['language'])) ? DI::l10n()->withLang($user['language']) : DI::l10n())
+			           ->newSystemMail(DI::app(), (!empty($user['language'])) ? DI::l10n()->withLang($user['language']) : DI::l10n())
 			           ->withMessage(DI::l10n()->t('Registration details for %s', DI::config()->get('config', 'sitename')), $preamble, $body)
 			           ->forUser($user['uid'] ?? 0)
 			           ->withRecipient($user['email'])

src/Util/EMailer/MailBuilder.php

@@ -138,11 +138,7 @@ abstract class MailBuilder
 	 */
 	public function build(bool $raw = false)
 	{
-		if (empty($this->recipientAddress)) {
-			throw new InternalServerErrorException('Recipient address is missing.');
-		}
-
-		if ((empty($this->senderName) || empty($this->senderAddress)) &&
+		if ((empty($this->recipientAddress)) &&
 		    !empty($this->recipientUid)) {
 			$user = User::getById($this->recipientUid, ['username', 'email']);
 

src/Util/EMailer/SystemMailBuilder.php

@@ -3,13 +3,13 @@
 namespace Friendica\Util\EMailer;
 
 use Exception;
+use Friendica\App;
 use Friendica\App\BaseURL;
 use Friendica\Content\Text\BBCode;
 use Friendica\Core\Config\IConfig;
 use Friendica\Core\L10n;
 use Friendica\Core\Renderer;
 use Friendica\Network\HTTPException\InternalServerErrorException;
-use Friendica\Util\Emailer;
 
 /**
  * Builder for system-wide emails without any dependency to concrete entities (like items, activities, ..)
@@ -26,7 +26,7 @@ class SystemMailBuilder extends MailBuilder
 	/** @var string */
 	protected $siteAdmin;
 
-	public function __construct(L10n $l10n, BaseURL $baseUrl, IConfig $config)
+	public function __construct(App $a, L10n $l10n, BaseURL $baseUrl, IConfig $config)
 	{
 		parent::__construct($l10n, $baseUrl, $config);
 
@@ -37,6 +37,8 @@ class SystemMailBuilder extends MailBuilder
 		} else {
 			$this->siteAdmin = $l10n->t('%s Administrator', $siteName);
 		}
+
+		$this->senderAddress = $a->getSenderEmailAddress();
 	}
 
 	/**
@@ -107,4 +109,15 @@ class SystemMailBuilder extends MailBuilder
 			'$textversion' => $textVersion,
 		]);
 	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function build(bool $raw = false)
+	{
+		// for system emails, always use the sitename/site address as the sender
+		$this->withSender($this->config->get('config', 'sitename'), $this->senderAddress);
+
+		return parent::build($raw);
+	}
 }

src/Util/Emailer.php

@@ -40,13 +40,14 @@ class Emailer
 	/**
 	 * Creates a new system email
 	 *
+	 * @param App $a The Friendica app
 	 * @param L10n $l10n The chosen language for the new email
 	 *
 	 * @return SystemMailBuilder
 	 */
-	public function newSystemMail(L10n $l10n)
+	public function newSystemMail(App $a, L10n $l10n)
 	{
-		return new SystemMailBuilder($l10n, $this->baseUrl, $this->config);
+		return new SystemMailBuilder($a, $l10n, $this->baseUrl, $this->config);
 	}
 
 	/**