automated SMTP server survey 19990417
7510 servers queried in the last 90 days
3929 52.31 Sendmail
548 7.29 MS Exchange
300 3.99 qmail
192 2.55 Netscape Mail server
187 2.49 Lotus
171 2.27 unknown
148 1.97 Exim
140 1.86 Post.Office
128 1.70 IMail
119 1.58 ZMailer
115 1.53 NT Mail
108 1.43 Smail
95 1.26 Raptor Firewall
94 1.25 CheckPoint FireWall-1
81 1.07 Mercur
80 1.06 Mercury
69 0.91 GroupWise
56 0.74 unknown (SMTP Rec.)
53 0.70 InterScan VirusWall
50 0.66 AltaVista Firewall
50 0.66 EMWACS IMS
50 0.66 Eudora/AIMS/Mailshare
50 0.66 PP
49 0.65 MS SMTP Mail
42 0.55 PMDF
41 0.54 Intermail
40 0.53 MailSite SMTP Receiver
34 0.45 SMTP/cmap
26 0.34 MDaemon
26 0.34 SLMail
24 0.31 Obtuse wrapper
22 0.29 Integralis SMTP Receiver
22 0.29 unknown (mailcity?)
20 0.26 NPlex
19 0.25 Rocketmail
17 0.22 Mail.Hub TurboSendmail
17 0.22 Stalker
16 0.21 MMDF
15 0.19 Mail-Max
13 0.17 InterLock
12 0.15 David PostMan
12 0.15 IMA SMTP
12 0.15 Postfix
11 0.14 FirstClass
11 0.14 MX
11 0.14 SMTP-GW
10 0.13 Apple Internet Mail Server
10 0.13 MMTA
10 0.13 Worldmail
9 0.11 AltaVista Mail
8 0.10 MailShield
8 0.10 Sun
7 0.09 TFS
6 0.07 DSMTP
6 0.07 FTGate
6 0.07 GMX (qmail?)
6 0.07 IBM AS/400 SMTP
6 0.07 IBM VM SMTP
6 0.07 Quickmail
6 0.07 Worldgroup
5 0.06 Kryptowall
4 0.05 AppleShare
4 0.05 ccMail
4 0.05 Connect2-SMTP
4 0.05 Cyberguard or so
4 0.05 Hawkeye SMTP
4 0.05 LSMTP
4 0.05 Soft-Switch LMS
4 0.05 UCX
4 0.05 WebShield
3 0.03 Lyris
3 0.03 PowerWeb
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 Rapidsite
2 0.02 SMTP/smtp-proxy
2 0.02 TGV/CISCO-MultiNet
2 0.02 USA.NET
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 MultiBase
1 0.01 NASTA Gate SMTP Server
1 0.01 Postfix/VMailer
1 0.01 SiteClick
1 0.01 SMTP-OpenVMS
1 0.01 Sonicmail
1 0.01 usmtpd
1 0.01 Viking
1 0.01 VOPMail