Message statistics are accessible in the admin panel. 



Inbound Filtering Overview

Total DELIVER
Total number of messages delivered to your destination
Total DEFER
The email was not accepted for delivery by a remote server.   However, the error condition is temporary and the email may be resent for another delivery attempt. 400-series SMTP codes
Total Rejects / Total Errors
The email could not be delivered because of a terminal error.  The sender-SMTP is discouraged from repeating the exact request for delivery (in the same sequence). Even some"permanent" error conditions can be corrected (i.e., a typo in the recipient address), so check the accuracy of the address. 500-series SMTP codes
Total
The cumulative number of Deliver / Defer / Reject / Error messages. The summary of your message volume.



Total DELIVER Sub-Category
(The system can be configured to accept spam, we can keep track of these messages that are delivered)
Delivered but tagged as spam
Our classification engine determined the message to be spam, but the system was overridden and the message was delivered.
Delivered but tagged as sender-spoof
Our classification engine determined the message was a violation of our sender spoof protection, but the system was overridden and the message was delivered.
Delivered clean
Messages that did not violate a filtering policy.



Total DEFER Sub-Category

Defers due to internal problems
These messages are deferred because of a problem with our internal processing of the message. The messages are deferred rather than rejected to ensure that the messages are not lost.
Defers due to unknown forwarding destination
The message was deferred due to a failure to deliver because the destination server was not found. This could be a DNS error or a network problem.
other or uncategorized defers
The message was deferred from delivering to the destination server.



Total REJECTS Sub-Category

Rejects due to sender being blocked
The sender has been manually blocked in your black/white list.
Rejects due to the recipient being blocked
The recipient has blocked in your blacklist.
Rejects due to recipient not on the whitelist
The recipient has not been approved in your recipient whitelist.
Rejects due to sender blacklisted
The sending domain was blacklisted manually in your black/white list.
Rejects due to IP reputation
The IP reputation of the sending server triggered a block. You can manually whitelist.
Rejects due to sender SPF failure
The SPF record of the sending domain does not authorize the IP of the server attempting to deliver messages.
Rejects due to definitive spam
Multiple anti-spam engines determined the message content to be spam.
Rejects due to virus scan trap
The message contained an attachment with a virus.
Rejects due to DLP scan trap
The message contained an executable attachment.
Other or uncategorized rejects



Total ERROR Sub-Category

Message bounced (DSN sent)
A delivery status notifications (DSN) was triggered to provide non-delivery reports (NDRs) and other status messages to the sender of a message. The message was not delivered, and the sender was alerted to the error. 
Message deleted (no DSN sent)
A delivery status notifications (DSN) was was not sent to the sender of a message. The message was not delivered, and the sender was not alerted to the error. This is typically a malfor
other or uncategorized errors
Messages that did not violate a filtering policy.