diff --git a/composer.json b/composer.json
index bdfd6859b..1f22e39b0 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,8 @@
 		"nette/tester": "^2.2",
 		"latte/latte": "^2.5",
 		"psr/log": "^1.0 || ^2.0 || ^3.0",
-		"phpstan/phpstan": "^1.0"
+		"phpstan/phpstan": "^1.0",
+		"nette/http": "^3.0"
 	},
 	"conflict": {
 		"nette/di": "<3.0"
diff --git a/src/Bridges/Nette/MailSender.php b/src/Bridges/Nette/MailSender.php
index bac96ae50..49b452a95 100644
--- a/src/Bridges/Nette/MailSender.php
+++ b/src/Bridges/Nette/MailSender.php
@@ -12,7 +12,6 @@
 use Nette;
 use Tracy;
 
-
 /**
  * Tracy logger bridge for Nette Mail.
  */
@@ -25,17 +24,21 @@ class MailSender
 	/** @var string|null sender of email notifications */
 	private ?string $fromEmail = null;
 
+	/** @var string|null actual host on which notification occurred - visible in subject */
+	private ?string $host = null;
+
 
-	public function __construct(Nette\Mail\IMailer $mailer, ?string $fromEmail = null)
+	public function __construct(Nette\Mail\IMailer $mailer, ?string $fromEmail = null, ?string $host = null)
 	{
 		$this->mailer = $mailer;
 		$this->fromEmail = $fromEmail;
+		$this->host = $host;
 	}
 
 
 	public function send(mixed $message, string $email): void
 	{
-		$host = preg_replace('#[^\w.-]+#', '', $_SERVER['SERVER_NAME'] ?? php_uname('n'));
+		$host = preg_replace('#[^\w.-]+#', '', $this->host ?? $_SERVER['SERVER_NAME'] ?? php_uname('n'));
 
 		$mail = new Nette\Mail\Message;
 		$mail->setHeader('X-Mailer', 'Tracy');
diff --git a/src/Bridges/Nette/TracyExtension.php b/src/Bridges/Nette/TracyExtension.php
index 9d4df697c..6649e0257 100644
--- a/src/Bridges/Nette/TracyExtension.php
+++ b/src/Bridges/Nette/TracyExtension.php
@@ -116,8 +116,14 @@ public function afterCompile(Nette\PhpGenerator\ClassType $class)
 		}
 
 		if ($this->config->netteMailer && $builder->getByType(Nette\Mail\IMailer::class)) {
+			$senderParams = [];
+			$senderParams['fromEmail'] = $this->config->fromEmail;
+			if (class_exists(Nette\Http\Request::class)) {
+				$senderParams['host'] = new Statement('($request = $this->getByType(?, false)) \? $request->getUrl()->getHost() : null', [Nette\Http\Request::class]);
+			}
+
 			$initialize->addBody($builder->formatPhp('if ($logger instanceof Tracy\Logger) $logger->mailer = ?;', [
-				[new Statement(Tracy\Bridges\Nette\MailSender::class, ['fromEmail' => $this->config->fromEmail]), 'send'],
+				[new Statement(Tracy\Bridges\Nette\MailSender::class, $senderParams), 'send'],
 			]));
 		}