| Count | MTA |
|---|---|
| 283 | postfix |
| 174 | MS Exchange |
| 115 | blocked |
| 72 | sendmail |
| 39 | Exim |
| 23 | unknown |
| 23 | mdaemon |
| 20 | Cisco |
| 17 | qpsmtpd |
| 7 | Sophos |
| 7 | qmail |
| 6 | barracuda |
| 5 | Kerio |
| 5 | Lotus Domino |
| 3 | MailEnable |
| 3 | eSafe |
| 2 | TrendMicro Reputation |
| 1 | communigate |
| 1 | Code-Crafters |
| 1 | stalker |
| 1 | mailmarshal |
| 808 | TOTAL |