diff --git a/src/MailerHelper.php b/src/MailerHelper.php
index 7a47840602a3e824744eb154305980368e8bd620..2baf3aa3a80eae0f5e90c966aeef239dee6cc884 100644
--- a/src/MailerHelper.php
+++ b/src/MailerHelper.php
@@ -99,7 +99,11 @@ class MailerHelper implements MailerHelperInterface {
    * {@inheritdoc}
    */
   public function parseAddress(string $encoded, string $langcode = NULL) {
+    $addresses = [];
     foreach (explode(',', $encoded) as $part) {
+      if (empty(trim($part))) {
+        continue;
+      }
       // Code copied from \Symfony\Component\Mime\Address::create().
       if (strpos($part, '<')) {
         if (!preg_match(self::FROM_STRING_PATTERN, $part, $matches)) {