qmail-smtpd - receive mail via SMTP
qmail-smtpd receives mail messages via the Simple Mail
Transfer Protocol (SMTP) and invokes qmail-queue to
deposit them into the outgoing queue. qmail-smtpd must be
supplied several environment variables; see tcp-envi-
qmail-smtpd is responsible for counting hops. It rejects
any message with 100 or more Received or Delivered-To
qmail-smtpd supports ESMTP, including the 8BITMIME and
qmail-smtpd converts the SMTP newline convention into the
UNIX newline convention by converting CR LF into LF.
qmail-smtpd accepts messages that contain long lines or
non-ASCII characters, even though such messages violate
the SMTP protocol.
Replacement host name for local IP addresses.
Default: me, if that is supplied. qmail-smtpd is
responsible for recognizing dotted-decimal addresses
for the current host. When it sees a recipient
address of the form box@[d.d.d.d], where d.d.d.d is a
local IP address, it replaces [d.d.d.d] with
localiphost. This is done before rcpthosts.
Allowed RCPT domains. If rcpthosts is supplied,
qmail-smtpd will reject any envelope recipient
address with a domain not listed in rcpthosts.
Exception: If the environment variable RELAYCLIENT is
set, qmail-smtpd will ignore rcpthosts, and will
append the value of RELAYCLIENT to each incoming
SMTP greeting message. Default: me, if that is sup-
plied; otherwise qmail-smtpd will refuse to run. The
first word of smtpgreeting should be the current
Number of seconds qmail-smtpd will wait for each new
buffer of data from the remote SMTP client. Default:
tcp-env(1), tcp-environ(5), qmail-control(5),
qmail-inject(8), qmail-queue(8), qmail-remote(8)