| Count | MTA |
|---|---|
| 1298 | postfix |
| 577 | Exim |
| 351 | MS Exchange |
| 186 | blocked |
| 74 | MailEnable |
| 66 | sendmail |
| 65 | Cisco |
| 60 | unknown |
| 57 | eSafe |
| 50 | mdaemon |
| 40 | qmail |
| 32 | barracuda |
| 24 | Kerio |
| 22 | stalker |
| 8 | rblsmtpd |
| 6 | TrendMicro Reputation |
| 5 | Lotus Domino |
| 3 | mailmarshal |
| 3 | communigate |
| 1 | assp |
| 1 | MIMESWeeper |
| 1 | Scalix |
| 1 | SonicWALL |
| 1 | Sophos |
| 1 | SurgeSMTP |
| 1 | $1 |
| 1 | james |
| 2935 | TOTAL |