| Count | MTA |
|---|---|
| 111 | blocked |
| 77 | MS Exchange |
| 55 | postfix |
| 36 | unknown |
| 12 | Cisco |
| 9 | barracuda |
| 9 | mdaemon |
| 8 | eSafe |
| 6 | Sophos |
| 4 | Exim |
| 4 | sendmail |
| 3 | TrendMicro Reputation |
| 3 | MailEnable |
| 1 | coremail |
| 1 | Winmail |
| 1 | InterScan |
| 1 | qpsmtpd |
| 1 | spamsniper |
| 1 | mailmarshal |
| 1 | XMail |
| 1 | Cellopoint |
| 1 | Lotus Domino |
| 346 | TOTAL |