| Count | MTA |
|---|---|
| 1020 | Exim |
| 937 | postfix |
| 413 | MS Exchange |
| 366 | blocked |
| 228 | unknown |
| 57 | sendmail |
| 50 | MailEnable |
| 40 | Cisco |
| 24 | mdaemon |
| 14 | eSafe |
| 12 | TrendMicro Reputation |
| 10 | qmail |
| 7 | Lotus Domino |
| 4 | rblsmtpd |
| 3 | Sophos |
| 2 | Code-Crafters |
| 2 | SonicWALL |
| 2 | Mercury |
| 2 | communigate |
| 2 | Kerio |
| 2 | merak |
| 2 | IceWarp |
| 1 | CheckPoint FW |
| 1 | hamster |
| 1 | james |
| 1 | Python SMTP |
| 1 | DeskNow |
| 1 | Novell Groupwise |
| 1 | XMail |
| 1 | XWall/Exchange |
| 1 | barracuda |
| 1 | Sun JSMS |
| 1 | qpsmtpd |
| 3210 | TOTAL |