>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3302514. --> Reported by: [mglaman](https://www.drupal.org/user/2416470) >>> <h2>Drupal version</h2> <p>9.4.x</p> <h2>Drupal Rector version</h2> <p>0.13.0</p> <h2>Problem / Motivation</h2> <p>Scanning the SMTP module finds this deprecation that doesn't have a rule:</p> <pre>Call to deprecated method mimeHeaderEncode() of class Drupal\Component\Utility\Unicode. Deprecated in drupal:9.2.0 and is removed from drupal:10.0.0. Use \Symfony\Component\Mime\Header\UnstructuredHeader instead.</pre>