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Document information
| Document ID: | 686 |
|---|---|
| Subject: | Email Challenge Response |
| Creation date: | 7/11/09 11:36 PM |
| Last modified on: | 7/11/09 11:59 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
