| Count | MTA |
|---|---|
| 791 | MS Exchange |
| 754 | Exim |
| 583 | blocked |
| 183 | Cisco |
| 146 | postfix |
| 105 | MailEnable |
| 100 | unknown |
| 59 | sendmail |
| 55 | barracuda |
| 28 | modusMail |
| 23 | mdaemon |
| 22 | eSafe |
| 21 | SonicWALL |
| 10 | TrendMicro Reputation |
| 8 | Kerio |
| 6 | qmail |
| 6 | communigate |
| 5 | assp |
| 5 | IceWarp |
| 4 | Lotus Domino |
| 4 | Sophos |
| 2 | qpsmtpd |
| 1 | Novell Groupwise |
| 1 | merak |
| 1 | Hexamail |
| 1 | mirapoint |
| 1 | AS/400 IBM SMTP |
| 2925 | TOTAL |