SYMPTOMS

Attachments are being removed upon receipt of a mail message.

CAUSE

If attachments are being strippped upon receipt of a message, there are four probable causes.

1. An antivirus plugin is detecting/cleaning a message. If all attachments are being removed, regardless of type of attachment, chances are that the anti virus plugin is configured incorrectly.

2. A pickup event can cause attachments to be removed. In this situation, check the criteria and ensure it is not removing all attachments due to incorrect criteria.  To test this, try disabling the event.

3. A configured filter either at the mailbox level or the server level. Check the logs for the diagnosis of this problem.

4. A client configured filter or security file filter could be removing the file.

RESOLUTION

1. If valid attachments are being removed from emails, the antivirus configuration settings may be incorrectly set. Disable the antivirus filter and if the attachments are not being removed,  check the antivirus settings.
2. Check any pickup events configured in the MTA.
3. Check and remove any filters that may be having the effect.
4. Ensure there are no rules or filters set up on the client.