| Count | MTA |
|---|---|
| 6960 | postfix |
| 3174 | Exim |
| 1450 | blocked |
| 727 | unknown |
| 352 | sendmail |
| 345 | MS Exchange |
| 194 | qmail |
| 37 | MailEnable |
| 29 | Cisco |
| 29 | mdaemon |
| 22 | rblsmtpd |
| 20 | qpsmtpd |
| 18 | Kerio |
| 11 | communigate |
| 8 | barracuda |
| 6 | Lotus Domino |
| 6 | IceWarp |
| 6 | XMail |
| 6 | firstclass |
| 4 | XWall/Exchange |
| 3 | eSafe |
| 2 | hmailserver |
| 2 | TrendMicro Reputation |
| 2 | Mercury |
| 2 | assp |
| 2 | Lotus Notes |
| 1 | Scalix |
| 1 | Symantec AVGate |
| 1 | ims |
| 1 | james |
| 1 | merak |
| 1 | stalker |
| 1 | SurgeSMTP |
| 13424 | TOTAL |