| Count | MTA |
|---|---|
| 1852 | postfix |
| 905 | Exim |
| 870 | unknown |
| 242 | sendmail |
| 98 | MS Exchange |
| 82 | blocked |
| 71 | mdaemon |
| 22 | communigate |
| 16 | Kerio |
| 10 | Cisco |
| 7 | MailEnable |
| 5 | qmail |
| 4 | barracuda |
| 3 | rblsmtpd |
| 3 | IceWarp |
| 1 | eSafe |
| 1 | TrendMicro Reputation |
| 1 | TrafficInspector |
| 1 | stalker |
| 1 | Lotus Domino |
| 4195 | TOTAL |