| Count | MTA |
|---|---|
| 3293 | postfix |
| 1542 | blocked |
| 1359 | unknown |
| 1041 | MS Exchange |
| 565 | Exim |
| 411 | sendmail |
| 158 | Cisco |
| 133 | qmail |
| 120 | Kerio |
| 61 | IceWarp |
| 21 | rblsmtpd |
| 15 | MailEnable |
| 11 | Lotus Domino |
| 8 | barracuda |
| 7 | TrendMicro Reputation |
| 6 | communigate |
| 6 | XMail |
| 6 | Mercury |
| 5 | SonicWALL |
| 5 | Spamfilter ISP |
| 4 | mdaemon |
| 4 | Novell Groupwise |
| 3 | eSafe |
| 2 | qpsmtpd |
| 2 | XWall/Exchange |
| 1 | Code-Crafters |
| 1 | VHCS |
| 1 | mailmarshal |
| 1 | RaidenMAILD |
| 1 | Python SMTP |
| 1 | Argosoft NT |
| 8794 | TOTAL |