automated SMTP server survey 19990301
6814 servers queried in the last 90 days
3627 53.22 Sendmail
494 7.24 MS Exchange
260 3.81 qmail
188 2.75 unknown
173 2.53 Netscape Mail server
161 2.36 Lotus
129 1.89 Post.Office
119 1.74 Exim
113 1.65 NT Mail
104 1.52 IMail
96 1.40 ZMailer
95 1.39 Smail
85 1.24 CheckPoint FireWall-1
80 1.17 Mercury
71 1.04 Raptor Firewall
65 0.95 Mercur
54 0.79 PP
53 0.77 GroupWise
49 0.71 EMWACS IMS
48 0.70 AltaVista Firewall
46 0.67 MS SMTP Mail
43 0.63 Eudora/AIMS/Mailshare
40 0.58 Intermail
39 0.57 unknown (SMTP Rec.)
37 0.54 PMDF
35 0.51 InterScan VirusWall
35 0.51 MailSite SMTP Receiver
27 0.39 SLMail
23 0.33 Integralis SMTP Receiver
23 0.33 MDaemon
22 0.32 Mail.Hub TurboSendmail
22 0.32 SMTP/cmap
20 0.29 Obtuse wrapper
18 0.26 NPlex
17 0.24 InterLock
17 0.24 Mail-Max
16 0.23 Rocketmail
16 0.23 unknown (mailcity?)
15 0.22 MX
13 0.19 MMDF
13 0.19 Worldmail
12 0.17 Stalker
11 0.16 Postfix
10 0.14 AltaVista Mail
10 0.14 SMTP-GW
9 0.13 David PostMan
9 0.13 FirstClass
9 0.13 MMTA
8 0.11 IMA SMTP
8 0.11 MailShield
7 0.10 Apple Internet Mail Server
7 0.10 Sun
7 0.10 TFS
6 0.08 GMX (qmail?)
6 0.08 IBM VM SMTP
6 0.08 Worldgroup
5 0.07 Connect2-SMTP
5 0.07 Quickmail
5 0.07 UCX
4 0.05 FTGate
4 0.05 Hawkeye SMTP
4 0.05 IBM AS/400 SMTP
4 0.05 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 PowerWeb
3 0.04 Soft-Switch LMS
3 0.04 Tid InfoMail
3 0.04 VOPMail
3 0.04 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 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 TGV/CISCO-MultiNet
1 0.01 usmtpd