title: Partially Delivered Email Causes Error in CF10
body: <p>My company just turned on sender validation for the SMTP relay.  So in the old days, I could send an email to nobody@company.com and it would not result in any error.  Now, that email results in this:</p>
  
  <pre><code>"Error","scheduler-2","10/31/16","09:04:49",,
  "com.sun.mail.smtp.SMTPSendFailedException:
  250 2.0.0 xxxxxxxx-1 Message accepted for delivery ;
  nested exception is: com.sun.mail.smtp.SMTPAddressFailedException:
  550 5.1.1 User Unknown on Mail Relay"
  </code></pre>
  
  <p>Is there anything I can do via JVM arguments or anything else to ignore these errors and consider the email sent?  There's a box where we send out 2-3K emails a day and there's about 1K of "undelivered" emails now on a daily basis. :(</p>