Merge pull request #6900 from JediKev/issue/microsoft-utf8-bom

Reviewed-By: JediKev <kevin@enhancesoft.com>

include/laminas-mail/src/Headers.php

@@ -88,6 +88,10 @@ class Headers implements Countable, Iterator
      */
     public static function fromString($string, $eol = self::EOL)
     {
+        // PATCH: Strip UTF-8 BOM
+        if (preg_match("/^\xEF\xBB\xBF/", $string))
+            $string = preg_replace('/^\xEF\xBB\xBF/', '', $string);
+
         $headers     = new static();
         $currentLine = '';
         $emptyLine   = 0;