automated SMTP server survey 19990616
8188 servers queried in the last 90 days
4141 50.57 Sendmail
577 7.04 MS Exchange
346 4.22 qmail
288 3.51 unknown
209 2.55 Lotus
202 2.46 Netscape Mail server
167 2.03 IMail
161 1.96 Exim
151 1.84 Post.Office
127 1.55 NT Mail
125 1.52 CheckPoint FireWall-1
118 1.44 Raptor Firewall
115 1.40 ZMailer
110 1.34 Smail
102 1.24 Mercur
82 1.00 GroupWise
72 0.87 Mercury
71 0.86 unknown (SMTP Rec.)
62 0.75 InterScan VirusWall
59 0.72 AltaVista Firewall
50 0.61 EMWACS IMS
48 0.58 Eudora/AIMS/Mailshare
48 0.58 MS SMTP Mail
41 0.50 SMTP/cmap
40 0.48 MailSite SMTP Receiver
39 0.47 PP
37 0.45 PMDF
30 0.36 Intermail
30 0.36 Obtuse wrapper
29 0.35 MDaemon
29 0.35 NPlex
23 0.28 InterLock
23 0.28 Rocketmail
22 0.26 Postfix
22 0.26 SLMail
22 0.26 unknown (mailcity?)
21 0.25 David PostMan
19 0.23 Integralis SMTP Receiver
19 0.23 Stalker
15 0.18 Mail-Max
15 0.18 Mail.Hub TurboSendmail
15 0.18 MX
14 0.17 GMX (qmail?)
14 0.17 IMA SMTP
13 0.15 FirstClass
13 0.15 MMDF
12 0.14 Sun
11 0.13 MailShield
10 0.12 DSMTP
10 0.12 SMTP-GW
10 0.12 Worldmail
9 0.10 AltaVista Mail
9 0.10 Apple Internet Mail Server
8 0.09 IBM AS/400 SMTP
8 0.09 MMTA
8 0.09 WebShield
7 0.08 Cyberguard or so
7 0.08 FTGate
7 0.08 Hawkeye SMTP
7 0.08 Lyris
6 0.07 ccMail
6 0.07 IBM VM SMTP
6 0.07 Worldgroup
5 0.06 Quickmail
5 0.06 TFS
4 0.04 AppleShare
4 0.04 Connect2-SMTP
4 0.04 Kryptowall
4 0.04 Rapidsite
4 0.04 Soft-Switch LMS
4 0.04 UCX
3 0.03 MailBeamer
3 0.03 SMTP/smtp-proxy
3 0.03 Tid InfoMail
3 0.03 WorldSecure
2 0.02 IPAD
2 0.02 LSMTP
2 0.02 Mail.Link
2 0.02 PowerWeb
2 0.02 SiteClick
2 0.02 USA.NET
2 0.02 usmtpd
1 0.01 Charon
1 0.01 Hummingbird SMTPD
1 0.01 Interchange
1 0.01 iSMTP
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 TGV/CISCO-MultiNet
1 0.01 Viking