automated SMTP server survey 19990216
6384 servers queried in the last 90 days
3399 53.24 Sendmail
447 7.00 MS Exchange
241 3.77 qmail
201 3.14 unknown
157 2.45 Netscape Mail server
152 2.38 Lotus
116 1.81 Post.Office
111 1.73 Exim
107 1.67 NT Mail
98 1.53 IMail
92 1.44 Smail
88 1.37 ZMailer
78 1.22 CheckPoint FireWall-1
74 1.15 Mercury
66 1.03 Raptor Firewall
60 0.93 Mercur
53 0.83 PP
51 0.79 GroupWise
47 0.73 EMWACS IMS
45 0.70 AltaVista Firewall
45 0.70 MS SMTP Mail
40 0.62 Intermail
38 0.59 Eudora/AIMS/Mailshare
36 0.56 unknown (SMTP Rec.)
35 0.54 PMDF
32 0.50 InterScan VirusWall
32 0.50 MailSite SMTP Receiver
26 0.40 SLMail
23 0.36 Integralis SMTP Receiver
21 0.32 Mail.Hub TurboSendmail
21 0.32 MDaemon
20 0.31 Obtuse wrapper
17 0.26 InterLock
17 0.26 NPlex
17 0.26 SMTP/cmap
16 0.25 Mail-Max
16 0.25 unknown (mailcity?)
15 0.23 MX
15 0.23 Rocketmail
12 0.18 MMDF
12 0.18 Worldmail
10 0.15 AltaVista Mail
9 0.14 FirstClass
9 0.14 Postfix
9 0.14 SMTP-GW
9 0.14 Stalker
8 0.12 David PostMan
8 0.12 MMTA
7 0.10 Sun
7 0.10 TFS
6 0.09 Apple Internet Mail Server
6 0.09 GMX (qmail?)
6 0.09 IBM VM SMTP
6 0.09 IMA SMTP
6 0.09 MailShield
6 0.09 Worldgroup
5 0.07 Connect2-SMTP
5 0.07 Quickmail
5 0.07 UCX
4 0.06 Hawkeye SMTP
4 0.06 Kryptowall
3 0.04 AppleShare
3 0.04 ccMail
3 0.04 Cyberguard or so
3 0.04 DSMTP
3 0.04 LSMTP
3 0.04 Soft-Switch LMS
3 0.04 VOPMail
3 0.04 WebShield
2 0.03 Charon
2 0.03 FTGate
2 0.03 IBM AS/400 SMTP
2 0.03 IPAD
2 0.03 Mail.Link
2 0.03 MultiBase
2 0.03 Rapidsite
2 0.03 Tid InfoMail
2 0.03 USA.NET
2 0.03 Viking
1 0.01 Black Hole
1 0.01 Fwmail
1 0.01 Hummingbird SMTPD
1 0.01 IBM MVS SMTP
1 0.01 IMA ESMTP
1 0.01 iSMTP
1 0.01 MailBeamer
1 0.01 Mailmonster
1 0.01 mirabilis pager?
1 0.01 NASTA Gate SMTP Server
1 0.01 Postfix/VMailer
1 0.01 PowerWeb
1 0.01 SMTP-OpenVMS
1 0.01 Sonicmail
1 0.01 TGV/CISCO-MultiNet
1 0.01 usmtpd