automated SMTP server survey 19991016
10751 servers queried in the last 90 days
5313 49.41 Sendmail
788 7.32 MS Exchange
517 4.80 qmail
496 4.61 unknown
283 2.63 IMail
240 2.23 Lotus
225 2.09 Exim
215 1.99 Netscape Mail server
196 1.82 Post.Office
171 1.59 Raptor Firewall
158 1.46 CheckPoint FireWall-1
151 1.40 NT Mail
149 1.38 ZMailer
125 1.16 Mercur
113 1.05 Smail
110 1.02 GroupWise
94 0.87 unknown (SMTP Rec.)
77 0.71 InterScan VirusWall
73 0.67 AltaVista Firewall
72 0.66 Mercury
69 0.64 SMTP/cmap
62 0.57 Eudora/AIMS/Mailshare
56 0.52 MS SMTP Mail
55 0.51 MailSite SMTP Receiver
53 0.49 Intermail
53 0.49 Postfix
50 0.46 MDaemon
50 0.46 PMDF
48 0.44 EMWACS IMS
41 0.38 Obtuse wrapper
37 0.34 NPlex
35 0.32 PP
31 0.28 Mail-Max
31 0.28 Stalker
29 0.26 Sun
26 0.24 David PostMan
25 0.23 Integralis SMTP Receiver
25 0.23 unknown (mailcity?)
24 0.22 SLMail
20 0.18 InterLock
19 0.17 Rocketmail
19 0.17 SMTP-GW
19 0.17 WebShield
19 0.17 Worldmail
18 0.16 DSMTP
18 0.16 MailShield
15 0.13 Mail.Hub TurboSendmail
14 0.13 FirstClass
13 0.12 MMDF
12 0.11 AltaVista Mail
12 0.11 IMA SMTP
11 0.10 IBM AS/400 SMTP
11 0.10 Lyris
11 0.10 MX
9 0.08 AppleShare
9 0.08 TFS
8 0.07 ccMail
8 0.07 GMX (qmail?)
7 0.06 Apple Internet Mail Server
7 0.06 Hawkeye SMTP
7 0.06 LSMTP
7 0.06 Rapidsite
6 0.05 FTGate
6 0.05 IBM VM SMTP
5 0.04 Connect2-SMTP
5 0.04 Cyberguard or so
5 0.04 MMTA
5 0.04 Quickmail
5 0.04 UCX
4 0.03 Interchange
4 0.03 IPAD
4 0.03 Worldgroup
4 0.03 WorldSecure
3 0.02 Mail.Link
3 0.02 SMTP/smtp-proxy
3 0.02 Soft-Switch LMS
3 0.02 Tid InfoMail
3 0.02 USA.NET
3 0.02 usmtpd
2 0.01 Fwmail
2 0.01 iSMTP
2 0.01 Kryptowall
2 0.01 MailBeamer
2 0.01 PowerWeb
1 0.00 Hummingbird SMTPD
1 0.00 LetterRip
1 0.00 Mailmonster
1 0.00 mirabilis pager?
1 0.00 NASTA Gate SMTP Server
1 0.00 Postfix/VMailer
1 0.00 SiteClick
1 0.00 SMTP-OpenVMS
1 0.00 TGV/CISCO-MultiNet
1 0.00 Viking
1 0.00 WatchGuard