Symptoms
Some incoming messages received by POP3 from the ISP are disappearing.
Cause
This can happen when WorkgroupMail is set to relay or reject messages to unknown recipients. Some incoming messages may be addressed to ficticious recipients, and these messages should be rejected. For some of the incoming messages WorkgroupMail may not be correctly identifying the recipient. Where possible different message headers should be used for the identification process.
Resolution
Configure WorkgroupMail to receive all messages (See detail below). Now, messages where the recipient is not known will be delivered to the default recipient.
If the recipient is not a local user then it may be necessary to configure WorkgroupMail to relay or reject such mail for this domain. Alternatively, a simple rule in Content Filtering could quarantine such messages.
If the recipient is a local user but WorkgroupMail is not identifying the recipient correctly, then it may be necessary to configure WorkgroupMail to use different headers in the message. Refer to the following FAQ and its associated links.
Mail downloaded from my ISP is not delivered to the correct local user
Detail
To configure WorkgroupMail to receive all messages.
- Open the Administrator and double click the domain in question
- Select the Unknown Recipients tab
- Check that Relay the message is NOT selected
- Check that Reject the message is NOT selected
Once the problem of disappearing messages is better understood, the relay and reject settings can be set as required.