makepercentrelay — Build a list of %-relayed domains
makepercentrelay
makepercentrelay reads
/etc/courier/esmtppercentrelay.dir
and creates /etc/courier/esmtppercentrelay.dat which is a
binary
database file. The files /etc/courier/esmtppercentrelay
and
/etc/courier/esmtppercentrelay.dat specify a list of
"percent-hack"
domains. /etc/courier/esmtppercentrelay is a plain text
file,
containing one domain per line.
The Courier mail server loads the
contents of
/etc/courier/esmtppercentrelay into memory, so if you
have a lot of
domains, you will want to use the binary database file. The
makepercentrelay command reads
/etc/courier/esmtppercentrelay.dir, which can be either
a plain text
file itself, or a directory containing plain text files. All files in the
subdirectory are concatenated, and the binary database file is created from
the result.
the Courier mail server can use both /etc/courier/esmtppercentrelay and
/etc/courier/esmtppercentrelay.dat at the same time.
Usually you
would put a couple of your most frequent domains in
/etc/courier/esmtppercentrelay, then put the rest in
/etc/courier/esmtppercentrelay.dir, and use
makepercentrelay to turn it into a database file.
"percent-hack" domains are a list of domains for which the Courier mail server accepts mail
via ESMTP addressed as "local%percent.hack.domain@local.domain", where
"percent.hack.domain" is a domain found in
/etc/courier/esmtppercentrelay or
/etc/courier/esmtppercentrelay.dat, and
"local.domain" is any domain
found in /etc/courier/locals.
The Courier mail server removes the local
domain, and
rewrites the address as "local@percent.hack.domain", then
attempts to deliver it.
The percent hack applies only to mail received via ESMTP.
The Courier mail server does not
check this list of domains if the message is received via any other way (such
as by running /usr/lib/courier/bin/sendmail directly from the command
line).
"percent.hack.domain" would likely to be a domain that
the Courier mail server
knows how to handle via some other means. It might be an entry in
/etc/courier/aliases, or an entry in
/etc/courier/esmtproutes.