| Count | MTA |
|---|---|
| 109 | MS Exchange |
| 108 | postfix |
| 47 | MailEnable |
| 27 | Cisco |
| 26 | blocked |
| 22 | unknown |
| 7 | Eudora |
| 7 | Kerio |
| 5 | barracuda |
| 5 | mdaemon |
| 4 | eSafe |
| 4 | SonicWALL |
| 3 | Sophos |
| 2 | qmail |
| 2 | communigate |
| 1 | merak |
| 1 | Exim |
| 1 | sendmail |
| 1 | TrendMicro Reputation |
| 1 | mailmarshal |
| 1 | SurgeSMTP |
| 384 | TOTAL |