# Stem Docs

## List Outdated Relays

Time marches on. Tor makes new releases, and at some point needs to drop support for old ones. Below is the script we used on ticket 9476 to reach out to relay operators that needed to upgrade.

    from stem.descriptor.remote import DescriptorDownloader
    from stem.version import Version

    downloader = DescriptorDownloader()
    count, with_contact = 0, 0

    print("Checking for outdated relays...")
    print("")

    for desc in downloader.get_server_descriptors():
      if desc.tor_version < Version('0.2.3.0'):
        count += 1

        if desc.contact:
          print('  %-15s %s' % (desc.tor_version, desc.contact.decode("utf-8", "replace")))
          with_contact += 1

    print("")
    print("%i outdated relays found, %i had contact information" % (count, with_contact))

    % python outdated_relays.py
    Checking for outdated relays...

      0.2.2.39        Random Person admin@gtr-10.de
      0.2.2.36        dobrovich_psckaal at vietrievus dot ok
      0.2.2.39        anonymous6 anonymous@mailinator.com
      0.2.2.39        anonymous12 anonymous@mailinator.com
      ...

    316 outdated relays found, 120 had contact information