For VPOP3 to monitor outbound messages it needs to be able to work out that the message is
FROM: a user whose mail should be monitored. To do this it has to examine the
FROM: address in the message header.
If the message is
FROM: email@example.com, VPOP3 will look to see if
firstname.lastname@example.org is a local user or not.
Monitor All Outbound Messages, VPOP3 will check the
Local Domainssetting on the
Local Mailtab to see if it contains the
Monitor Selected Outbound Messages, VPOP3 will check the
Local Domainsas above, and it will also look for a VPOP3 user called
Fred, which must have the
Monitor Messagesoption enabled.
Note: if you use some form of SMTP authentication (either POP3 before SMTP authentication or full SMTP authentication), then VPOP3 will use the login name to decide whether it should monitor the message, instead of using the
FROM: address. (n.b. some email clients do not support SMTP authentication)