In order to scan mailboxes for invalid messages you will have to use the CLI interface. In order to connect to the CLI interface you can use telnet:
telnet <Axigen IP address> 7000
<login> user admin
<password> qwe123
For a list of available commands, type HELP
+OK: Authentication successful
<#>
Then enter the domain context:
UPDATE Domain name <domainName>
+OK: command successful
<domain#>
Now use the FINDINVALIDMSG command in order to scan for faulty messages. The usage of this command is:
FINDINVALIDMSG <accountName> [<accountName>...] [purge] - list and optionally remove faulty messages from specified accounts
For example, if you need to search mailboxes for user1@<domainName> and user2@<domainName> you will have to issue:
<domain#> FINDINVALIDMSG user1 user2
Note: You can add the optional purge which will remove faulty messages if found.