Document information

Document ID:4621
Subject:Email Challenge Response
Creation date:12/14/15 4:35 PM
Last modified on:12/14/15 4:35 PM


Email Challenge/Response


Challenge/Response filtering, also called auto-white-listing, or permission based email is increasingly popular and controversial mechanism to prevent spam. Though it can be extremely effective, it has draw-backs.

Consider the following scenario that explains this mechanism.
  • Bob sends an email message to Mary
  • Mary's email server accepts the message but before transferring it to her Inbox, the server sends a message back to Bob, confirming if he actually sent a message. Bob must reply to this automatically generated message which confirms his original message.
  • Since spammers almost always either forge the sender or send from invalid address. Therefore, Mary will never get the message is someone else pretends to be Bob.

Enabling Challenge/Response in Xeam

Follow the steps below to enable Challenge/Response in Xeams.
  • Log in to Admin Console
  • Click Server Configuration
  • Select the Challenge Response tab
  • Check Enable Challenge Response, specify an email for processing and a threshold value. Check the help in Admin Console for the exact description of each field.
  • Click the Save button

Disadvantages of using Challenge/Response

  • It is considered rude by many users
  • It is not a viable option if you receive emails from unknown individuals, such as potential clients
  • Slows down email delivery
  • Will never work if both parties use a Challenge/Response system




User comments

Posted by Bart on 9/18/15 8:05 AM

Hi there is any change to make customize the challenge message ? or it can be done by editing some files ?

Posted by Joe Looney on 8/27/14 6:59 PM

I agree that being able to customize the challenge message would be very helpful. It will allow me to briefly explain the need and apologize for the inconvenience. I can also add an alternative such as a phone number to call and be quickly whitelisted.

Posted by Chris Worall on 11/1/13 8:43 PM

Why not give us the option to customise the text that gets sent out. We might be able to word it to sound less rude!


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