| Count | MTA |
|---|---|
| 164 | MS Exchange |
| 147 | blocked |
| 145 | Exim |
| 112 | postfix |
| 70 | unknown |
| 60 | Cisco |
| 55 | TrendMicro Reputation |
| 37 | eSafe |
| 36 | MailEnable |
| 24 | qmail |
| 17 | sendmail |
| 16 | barracuda |
| 4 | modusMail |
| 3 | Lotus Domino |
| 2 | qpsmtpd |
| 2 | mdaemon |
| 2 | Kerio |
| 2 | Sophos |
| 1 | PowerMTA |
| 1 | hmailserver |
| 1 | iPlanet |
| 901 | TOTAL |