diff --git a/lib/Service/Html.php b/lib/Service/Html.php
index 5832263655..1376d88d7d 100755
--- a/lib/Service/Html.php
+++ b/lib/Service/Html.php
@@ -154,6 +154,7 @@ public function sanitizeHtmlMailBody(int $messageId, string $mailBody, array $in
 		$config->set('Filter.ExtractStyleBlocks.TidyImpl', false);
 		$config->set('CSS.AllowTricky', true);
 		$config->set('CSS.Proprietary', true);
+		$config->set('Attr.EnableID', true);
 
 		// Disable the cache since ownCloud has no really appcache
 		// TODO: Fix this - requires https://github.com/owncloud/core/issues/10767 to be fixed
diff --git a/tests/Unit/Service/HtmlTest.php b/tests/Unit/Service/HtmlTest.php
index 9813a31823..c646f8c265 100644
--- a/tests/Unit/Service/HtmlTest.php
+++ b/tests/Unit/Service/HtmlTest.php
@@ -246,4 +246,15 @@ public function testSanitizeStyleSheet() {
 		$sanitizedStyleSheet = $html->sanitizeStyleSheet($styleSheet);
 		self::assertSame($expected, $sanitizedStyleSheet);
 	}
+
+	public function testSanitizeHtmlMailBodyPreservesId(): void {
+		$urlGenerator = $this->createStub(IURLGenerator::class);
+		$request = $this->createStub(IRequest::class);
+		$hmacGenerator = $this->createStub(ProxyHmacGenerator::class);
+
+		$html = new Html($urlGenerator, $request, $hmacGenerator);
+		$result = $html->sanitizeHtmlMailBody(42, '<p id="target">hello</p>', []);
+
+		$this->assertStringContainsString('id="target"', $result);
+	}
 }