| Count | MTA |
|---|---|
| 27431 | unknown |
| 17707 | postfix |
| 15431 | blocked |
| 5209 | MS Exchange |
| 5135 | qmail |
| 4404 | Exim |
| 1936 | sendmail |
| 1144 | MailEnable |
| 631 | IceWarp |
| 493 | rblsmtpd |
| 362 | Cisco |
| 233 | mdaemon |
| 135 | merak |
| 134 | barracuda |
| 131 | TrendMicro Reputation |
| 115 | eSafe |
| 60 | Lotus Domino |
| 40 | PowerMTA |
| 39 | Kerio |
| 34 | VHCS |
| 32 | SurgeSMTP |
| 29 | qpsmtpd |
| 28 | XMail |
| 27 | SonicWALL |
| 21 | imail |
| 15 | modusMail |
| 14 | james |
| 11 | mailmarshal |
| 10 | MikroTik |
| 9 | Mercury |
| 9 | Argosoft NT |
| 5 | Winmail |
| 5 | Sophos |
| 5 | communigate |
| 4 | Symantec AVGate |
| 4 | Novell Groupwise |
| 3 | DeskNow |
| 2 | Softalk |
| 2 | assp |
| 2 | MailSite |
| 2 | Hurricane |
| 2 | stalker |
| 1 | Python SMTP |
| 1 | SMTPBeamer |
| 1 | MessageWall |
| 1 | XWall/Exchange |
| 1 | Windows NAI WebShield |
| 1 | Spamfilter ISP |
| 1 | Scalix |
| 1 | vpop3 |
| 1 | EMailArchitect |
| 1 | hmailserver |
| 1 | ims |
| 1 | firstclass |
| 81057 | TOTAL |