Mailfromd |
|
General-Purpose Mail Filter |
Sergey Poznyakoff |
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Several variables are predefined. In mailfromd
version
6.0 these are:
This variable is set by stdpoll
and strictpoll
built-ins
(and, consequently, by the on poll
statement). Its value is
‘1’ if the function used the cached data instead of directly
polling the host, and ‘0’ if the polling took place.
See section Polling Functions.
You can use this variable to make your reject message more informative
for the remote party. The common paradigm is to define a function,
returning empty string if the result was obtained from polling, or
some notice if cached data were used, and to use the function in the
reject
text, for example:
func cachestr() returns string do if %cache_used return "[CACHED] " else return "" fi done |
Then, in prog envfrom
one can use:
on poll $f do when not_found or failure: reject 550 5.1.0 cachestr() . "Sender validity not confirmed" done |
Name of virus identified by ClamAV
. Set by clamav
function (see ClamAV).
Number of seconds left to the end of greylisting period. Set by
greylist
and is_greylisted
functions (see section Special Test Functions).
Name of the domain used by polling functions in SMTP
EHLO
or HELO
command. Default value is the fully
qualified domain name of the host where mailfromd
is run.
See section Sender Verification Tests.
Polling functions (see section Polling Functions) set this variable before returning. It contains the initial SMTP reply from the last polled host.
Polling functions (see section Polling Functions) set this variable before
returning. It contains the reply to the HELO
(EHLO
)
command, received from the last polled host.
Polling functions (see section Polling Functions) set this variable before returning. It contains the host name or IP address of the last polled host.
Polling functions (see section Polling Functions) set this variable before returning. It contains the last SMTP reply received from the remote host. In case of multi-line replies, only the first line is stored. If nothing was received the variable contains the string ‘nothing’.
Polling functions (see section Polling Functions) set this variable before
returning. It contains the last SMTP command sent to the
polled host. If nothing was sent, last_poll_send
contains the string
‘nothing’.
Email address used by polling functions in SMTP MAIL
FROM
command (see section Sender Verification Tests.). Default is ‘<>’. Here is an
example of how to change it:
set mailfrom_address "postmaster@my.domain.com" |
You can set this value to a comma-separated list of email addresses, in which case the probing will try each address until either the remote party accepts it or the list of addresses is exhausted, whichever happens first.
It is not necessary to enclose emails in angle brackets, as they will be added automatically where appropriate. The only exception is null return address, when used in a list of addresses. In this case, it should always be written as ‘<>’. For example:
set mailfrom_address "postmaster@my.domain.com, <>" |
Spam score for the message, set by sa
function (see sa).
The variable rcpt_count
keeps the number of recipients given so
far by RCPT TO
commands. It is defined only in ‘envrcpt’
handlers.
Spam threshold, set by sa
function (see sa).
Spam keywords for the message, set by sa
function (see sa).
This variable controls the verbosity of the exception-safe database functions. See safedb_verbose.
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