| Count | MTA |
|---|---|
| 8966 | postfix |
| 3068 | Exim |
| 2462 | blocked |
| 2324 | MS Exchange |
| 2113 | unknown |
| 592 | qmail |
| 348 | sendmail |
| 263 | barracuda |
| 181 | Cisco |
| 81 | rblsmtpd |
| 69 | eSafe |
| 68 | MailEnable |
| 49 | mdaemon |
| 44 | Kerio |
| 38 | qpsmtpd |
| 20 | Lotus Domino |
| 17 | IceWarp |
| 17 | Mercury |
| 15 | hmailserver |
| 12 | XMail |
| 11 | Sophos |
| 9 | Argosoft NT |
| 7 | Novell Groupwise |
| 7 | TrendMicro Reputation |
| 7 | Code-Crafters |
| 5 | communigate |
| 5 | spamd |
| 4 | postoffice |
| 4 | vpop3 |
| 4 | SurgeSMTP |
| 2 | VHCS |
| 2 | DeskNow |
| 2 | CheckPoint FW |
| 1 | SonicWALL |
| 1 | Spamfilter ISP |
| 1 | Softalk |
| 1 | Scalix |
| 1 | Symantec AVGate |
| 1 | XWall/Exchange |
| 1 | james |
| 1 | vmsmx |
| 1 | merak |
| 1 | nplex |
| 20826 | TOTAL |