ArgoSoft mail server HELP response with version
214-This is ArGoSoft Mail Server, Version 1.4 (1.4.0.3)
ArgoSoft mail server HELP response
214-To report bug, send mail to support@argosoft.com
Cisco PIX - changes the command letters to 'X' before passing them to the real SMTP server
Eudora IMS uses the British spelling "unrecognised"
IBM VM
Microsoft Exchange/IIS server
Alt-N MDaemon - 214 Help system currently inactive.
Merak mail server - http://www.icewarp.com/merakmail/ (runs on 2000/NT/9x)
Merak mail server - http://www.icewarp.com/merakmail/ (runs on 2000/NT/9x) - variant 1
Merak mail server - http://www.icewarp.com/merakmail/ (runs on 2000/NT/9x) - email variant
Merak mail server - http://www.icewarp.com/merakmail/ (runs on 2000/NT/9x) - icewarp variant
QMail - help variant
214 qmail home page: http://pobox.com/~djb/qmail.html
Sendmail on Digital OSF UNIX
Sendmail often returns version information for HELP, even when the greeting is obscured
Sendmail often returns version information for HELP - variant 1
Sendmail - help not implemented variant
502 5.3.0 Sendmail 8.11.2 -- HELP not implemented
Sendmail often returns version information for HELP - email variant
ZMailer versions earlier than 2.99.21 mistakenly return the status code 241 on some HELP response lines (instead of 214).
ZMailer has distinctive default HELP text in smtpserver.conf