dwysocha : User unknown in local recipient table

[Michael Schwendt <mschwendt tmp0701 nospam arcor de>]

Somebody's mail address in the Fedora Account System refuses delivery
of mail:

Traceback (most recent call last):
  File "./upgradecheckspam.py", line 267, in ?
    main()
  File "./upgradecheckspam.py", line 258, in main
    s.sendmail(mail_from, [owner], msg.as_string())
  File "/usr/lib64/python2.3/smtplib.py", line 687, in sendmail
    raise SMTPRecipientsRefused(senderrs)
smtplib.SMTPRecipientsRefused: {'dwysocha': (550, '<dwysocha>: Recipient address rejected: User unknown in local recipient table')}