automated SMTP server survey 19990316
7421 servers queried in the last 90 days
3910 52.68 Sendmail
542 7.30 MS Exchange
280 3.77 qmail
210 2.82 unknown
186 2.50 Netscape Mail server
171 2.30 Lotus
141 1.90 Post.Office
133 1.79 Exim
124 1.67 NT Mail
122 1.64 IMail
110 1.48 ZMailer
108 1.45 Smail
92 1.23 CheckPoint FireWall-1
85 1.14 Mercury
79 1.06 Raptor Firewall
76 1.02 Mercur
58 0.78 GroupWise
56 0.75 MS SMTP Mail
56 0.75 PP
54 0.72 EMWACS IMS
51 0.68 AltaVista Firewall
48 0.64 unknown (SMTP Rec.)
46 0.61 Eudora/AIMS/Mailshare
42 0.56 Intermail
42 0.56 PMDF
40 0.53 InterScan VirusWall
39 0.52 MailSite SMTP Receiver
29 0.39 SLMail
28 0.37 SMTP/cmap
25 0.33 Integralis SMTP Receiver
25 0.33 MDaemon
24 0.32 Mail.Hub TurboSendmail
22 0.29 Obtuse wrapper
22 0.29 unknown (mailcity?)
19 0.25 NPlex
18 0.24 Rocketmail
17 0.22 InterLock
17 0.22 Mail-Max
15 0.20 MMDF
15 0.20 MX
14 0.18 Worldmail
13 0.17 Stalker
11 0.14 Postfix
11 0.14 SMTP-GW
10 0.13 AltaVista Mail
10 0.13 David PostMan
10 0.13 FirstClass
10 0.13 IMA SMTP
10 0.13 MMTA
9 0.12 Apple Internet Mail Server
9 0.12 Sun
8 0.10 MailShield
7 0.09 TFS
6 0.08 GMX (qmail?)
6 0.08 IBM VM SMTP
6 0.08 LSMTP
6 0.08 Worldgroup
5 0.06 Connect2-SMTP
5 0.06 Kryptowall
5 0.06 Quickmail
5 0.06 UCX
4 0.05 ccMail
4 0.05 FTGate
4 0.05 Hawkeye SMTP
4 0.05 IBM AS/400 SMTP
3 0.04 AppleShare
3 0.04 Cyberguard or so
3 0.04 DSMTP
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 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