automated SMTP server survey 19990901
9807 servers queried in the last 90 days
4863 49.58 Sendmail
717 7.31 MS Exchange
434 4.42 unknown
430 4.38 qmail
240 2.44 IMail
237 2.41 Lotus
204 2.08 Netscape Mail server
195 1.98 Exim
191 1.94 Post.Office
156 1.59 Raptor Firewall
151 1.53 CheckPoint FireWall-1
138 1.40 NT Mail
135 1.37 ZMailer
118 1.20 Mercur
112 1.14 Smail
105 1.07 GroupWise
93 0.94 unknown (SMTP Rec.)
73 0.74 InterScan VirusWall
73 0.74 Mercury
68 0.69 AltaVista Firewall
65 0.66 SMTP/cmap
55 0.56 MailSite SMTP Receiver
53 0.54 Eudora/AIMS/Mailshare
52 0.53 MS SMTP Mail
46 0.46 EMWACS IMS
45 0.45 PMDF
44 0.44 MDaemon
39 0.39 Postfix
38 0.38 PP
37 0.37 Intermail
36 0.36 Obtuse wrapper
30 0.30 NPlex
29 0.29 Mail-Max
27 0.27 Stalker
26 0.26 David PostMan
24 0.24 unknown (mailcity?)
22 0.22 Integralis SMTP Receiver
22 0.22 InterLock
22 0.22 SLMail
20 0.20 Rocketmail
19 0.19 Sun
18 0.18 SMTP-GW
16 0.16 Mail.Hub TurboSendmail
16 0.16 MailShield
16 0.16 WebShield
15 0.15 MMDF
14 0.14 Worldmail
12 0.12 AltaVista Mail
12 0.12 FirstClass
12 0.12 Lyris
11 0.11 IMA SMTP
10 0.10 MX
9 0.09 DSMTP
9 0.09 IBM AS/400 SMTP
9 0.09 Quickmail
9 0.09 TFS
8 0.08 Apple Internet Mail Server
8 0.08 GMX (qmail?)
8 0.08 MMTA
7 0.07 ccMail
7 0.07 Hawkeye SMTP
7 0.07 IBM VM SMTP
7 0.07 LSMTP
6 0.06 AppleShare
6 0.06 Connect2-SMTP
6 0.06 Cyberguard or so
5 0.05 FTGate
5 0.05 Rapidsite
5 0.05 UCX
5 0.05 WorldSecure
3 0.03 Interchange
3 0.03 IPAD
3 0.03 Mail.Link
3 0.03 SMTP/smtp-proxy
3 0.03 Tid InfoMail
3 0.03 USA.NET
3 0.03 Worldgroup
2 0.02 Kryptowall
2 0.02 LetterRip
2 0.02 PowerWeb
2 0.02 SiteClick
2 0.02 Soft-Switch LMS
2 0.02 usmtpd
1 0.01 Charon
1 0.01 Fwmail
1 0.01 Hummingbird SMTPD
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 TGV/CISCO-MultiNet
1 0.01 Viking