automated SMTP server survey 19990401
7902 servers queried in the last 90 days
4168 52.74 Sendmail
577 7.30 MS Exchange
299 3.78 qmail
235 2.97 unknown
194 2.45 Netscape Mail server
187 2.36 Lotus
146 1.84 Post.Office
144 1.82 Exim
131 1.65 IMail
131 1.65 NT Mail
118 1.49 ZMailer
113 1.43 Smail
96 1.21 CheckPoint FireWall-1
87 1.10 Raptor Firewall
86 1.08 Mercury
79 0.99 Mercur
63 0.79 GroupWise
60 0.75 MS SMTP Mail
57 0.72 PP
54 0.68 AltaVista Firewall
54 0.68 EMWACS IMS
52 0.65 Eudora/AIMS/Mailshare
52 0.65 unknown (SMTP Rec.)
48 0.60 InterScan VirusWall
46 0.58 Intermail
44 0.55 PMDF
37 0.46 MailSite SMTP Receiver
33 0.41 SMTP/cmap
30 0.37 SLMail
25 0.31 MDaemon
24 0.30 Integralis SMTP Receiver
24 0.30 Mail.Hub TurboSendmail
23 0.29 NPlex
23 0.29 Obtuse wrapper
22 0.27 unknown (mailcity?)
18 0.22 Rocketmail
17 0.21 InterLock
17 0.21 Mail-Max
16 0.20 MX
15 0.18 MMDF
14 0.17 Worldmail
13 0.16 Stalker
12 0.15 Postfix
11 0.13 FirstClass
11 0.13 SMTP-GW
10 0.12 AltaVista Mail
10 0.12 Apple Internet Mail Server
10 0.12 David PostMan
10 0.12 IMA SMTP
10 0.12 MailShield
10 0.12 MMTA
10 0.12 Sun
8 0.10 TFS
6 0.07 GMX (qmail?)
6 0.07 IBM VM SMTP
6 0.07 Kryptowall
6 0.07 LSMTP
6 0.07 Quickmail
6 0.07 Worldgroup
5 0.06 Connect2-SMTP
5 0.06 FTGate
5 0.06 IBM AS/400 SMTP
5 0.06 UCX
4 0.05 ccMail
4 0.05 Cyberguard or so
4 0.05 Hawkeye SMTP
4 0.05 Soft-Switch LMS
3 0.03 AppleShare
3 0.03 DSMTP
3 0.03 PowerWeb
3 0.03 Tid InfoMail
3 0.03 VOPMail
3 0.03 WebShield
2 0.02 Charon
2 0.02 IPAD
2 0.02 Mail.Link
2 0.02 MultiBase
2 0.02 Rapidsite
2 0.02 TGV/CISCO-MultiNet
2 0.02 USA.NET
2 0.02 Viking
1 0.01 Black Hole
1 0.01 Hummingbird SMTPD
1 0.01 IBM MVS SMTP
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 SMTP-OpenVMS
1 0.01 Sonicmail
1 0.01 usmtpd