automated SMTP server survey 19990501
7744 servers queried in the last 90 days
3970 51.26 Sendmail
559 7.21 MS Exchange
325 4.19 qmail
205 2.64 Netscape Mail server
200 2.58 Lotus
194 2.50 unknown
152 1.96 Exim
146 1.88 IMail
145 1.87 Post.Office
128 1.65 NT Mail
121 1.56 ZMailer
112 1.44 Smail
102 1.31 CheckPoint FireWall-1
102 1.31 Raptor Firewall
90 1.16 Mercur
78 1.00 Mercury
74 0.95 GroupWise
60 0.77 unknown (SMTP Rec.)
58 0.74 InterScan VirusWall
53 0.68 AltaVista Firewall
51 0.65 MS SMTP Mail
50 0.64 Eudora/AIMS/Mailshare
48 0.61 EMWACS IMS
48 0.61 PP
40 0.51 Intermail
40 0.51 MailSite SMTP Receiver
39 0.50 PMDF
36 0.46 SMTP/cmap
27 0.34 MDaemon
25 0.32 Obtuse wrapper
23 0.29 Integralis SMTP Receiver
23 0.29 NPlex
23 0.29 Rocketmail
23 0.29 unknown (mailcity?)
22 0.28 SLMail
18 0.23 Stalker
17 0.21 InterLock
17 0.21 Postfix
16 0.20 Mail.Hub TurboSendmail
15 0.19 MMDF
14 0.18 David PostMan
14 0.18 Mail-Max
13 0.16 IMA SMTP
12 0.15 FirstClass
12 0.15 MMTA
11 0.14 MX
11 0.14 SMTP-GW
10 0.12 Apple Internet Mail Server
9 0.11 AltaVista Mail
9 0.11 DSMTP
8 0.10 IBM AS/400 SMTP
8 0.10 MailShield
8 0.10 Worldmail
7 0.09 FTGate
7 0.09 GMX (qmail?)
7 0.09 Sun
6 0.07 IBM VM SMTP
6 0.07 Quickmail
6 0.07 TFS
6 0.07 Worldgroup
5 0.06 ccMail
5 0.06 Hawkeye SMTP
5 0.06 Kryptowall
5 0.06 LSMTP
4 0.05 AppleShare
4 0.05 Connect2-SMTP
4 0.05 Lyris
4 0.05 Soft-Switch LMS
4 0.05 UCX
4 0.05 WebShield
3 0.03 Cyberguard or so
3 0.03 PowerWeb
3 0.03 Rapidsite
3 0.03 Tid InfoMail
3 0.03 WorldSecure
2 0.02 Charon
2 0.02 IPAD
2 0.02 Mail.Link
2 0.02 SiteClick
2 0.02 SMTP/smtp-proxy
2 0.02 TGV/CISCO-MultiNet
2 0.02 USA.NET
2 0.02 usmtpd
1 0.01 Hummingbird SMTPD
1 0.01 IBM MVS SMTP
1 0.01 iSMTP
1 0.01 Mailmonster
1 0.01 mirabilis pager?
1 0.01 NASTA Gate SMTP Server
1 0.01 SMTP-OpenVMS
1 0.01 Sonicmail
1 0.01 Viking
1 0.01 VOPMail