One more addition: In case you have file format errors, you will not be able to see the messages in message monitoring. My approach above can help you in identifying the file which had errors apart from format ones.
For your case, you can set option for storing error files in an error folder in the Sender Comm. Channel.
It will store all such format error files there which can be manually checked.
On top of it, if you want notifications for such errors in real time, you will have to configure alerts to capture file format errors.
Thanks,
Abhishek