automated SMTP server survey 19990201
5756 servers queried in the last 30 days
3070 53.33 Sendmail
396 6.87 MS Exchange
225 3.90 qmail
183 3.17 unknown
143 2.48 Netscape Mail server
134 2.32 Lotus
103 1.78 Post.Office
97 1.68 NT Mail
94 1.63 Exim
86 1.49 Smail
84 1.45 IMail
79 1.37 ZMailer
70 1.21 CheckPoint FireWall-1
68 1.18 Mercury
61 1.05 Raptor Firewall
57 0.99 Mercur
47 0.81 PP
43 0.74 GroupWise
42 0.72 AltaVista Firewall
42 0.72 EMWACS IMS
42 0.72 MS SMTP Mail
36 0.62 Eudora/AIMS/Mailshare
34 0.59 unknown (SMTP Rec.)
33 0.57 Intermail
30 0.52 MailSite SMTP Receiver
30 0.52 PMDF
24 0.41 InterScan VirusWall
23 0.39 SLMail
21 0.36 Mail.Hub TurboSendmail
21 0.36 MDaemon
20 0.34 Integralis SMTP Receiver
18 0.31 Obtuse wrapper
17 0.29 InterLock
16 0.27 Mail-Max
15 0.26 NPlex
15 0.26 Rocketmail
15 0.26 unknown (mailcity?)
14 0.24 MX
13 0.22 SMTP/cmap
12 0.20 MMDF
10 0.17 Worldmail
9 0.15 FirstClass
9 0.15 SMTP-GW
8 0.13 AltaVista Mail
8 0.13 MMTA
8 0.13 Postfix
8 0.13 Stalker
7 0.12 David PostMan
7 0.12 Sun
6 0.10 IBM VM SMTP
6 0.10 MailShield
6 0.10 TFS
6 0.10 Worldgroup
5 0.08 Connect2-SMTP
5 0.08 GMX (qmail?)
5 0.08 Quickmail
4 0.06 IMA SMTP
4 0.06 Kryptowall
4 0.06 UCX
3 0.05 Apple Internet Mail Server
3 0.05 ccMail
3 0.05 Hawkeye SMTP
3 0.05 LSMTP
3 0.05 Soft-Switch LMS
3 0.05 VOPMail
3 0.05 WebShield
2 0.03 AppleShare
2 0.03 Charon
2 0.03 Cyberguard or so
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 DSMTP
1 0.01 Fwmail
1 0.01 Hummingbird SMTPD
1 0.01 IBM MVS SMTP
1 0.01 IMA ESMTP
1 0.01 Interchange
1 0.01 IPAD
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