|
The purpose of this module is the automatic removal of any spam
sent to me. In its current incarnation it does not delete the spam,
but moves it into the 'junk' folder of my MH setup, via
store2mh-folder. To change that the distributed
code has to be altered.
A future variant might even plug into my POP client from Pool and
delete spam while still on the server. This should reduce uptime and
therefore phone costs too (only the headers are required for this).
It is implemented as a rule set using special predicates to detect
the unwanted mail.
The directory <mainConfigDir>/spamblock is added to the
list of paths searched for configuration files.
|
Predicates
|
| Subcmd |
Description |
| unwantedSender |
|
|
|
Reads the configuration variable
spamblock/unwantedSender and interprets its contents
as a list of regexp patterns describing the email addresses
we don't accept any mail from.
Returns true if 'from:' matches at least one of the
patterns.
|
|
|
| localSender |
|
|
|
Returns true if the mail came from a local account.
A local account is either one not containing @ in the
address or one with @ in it and from the correct domain, as
found in info hostname.
Under U*ix it would be possible to check the account
against the passwd-file too.
|
|
|
| localTarget |
|
|
|
Returns true if the mail was sent to a local account.
'To:', 'Cc:' and 'Bcc:' are checked.
The addresses must either not contain an @, or the correct
domain. A check against the passwd-file is not done,
but might be in the future.
The configuration variable spamblock/localTarget
is read too, and its contents interpreted as a list of
addresses (regexp patterns). These explicitly declared
addresses are considered to be local too.
|
|
|
|
|
Actions
|
| Subcmd |
Description |
| junkit |
|
|
|
This is a convenience action, just a wrapper around
store2mh-folder junk; stop
|
|
|
|
The distributed rule set has the name spamblock and
discards mail according to the following rules:
- Mail without a valid 'To:' is spam and discarded.
- Mail coming from an unwanted address is spam and discarded.
- Mail neither coming from nor going to a local account is spam
and discarded. The latter (not going to a local account) currently
cuts 70% of the spam coming at me. The rest is spam containing my
address, or going to mailing lists, which are dispatched to their
folders before reaching the spam blocker. The latter is necessary
to prevent them from getting discarded as they usually have the
'mailing address' in their 'To:' header.
See the last of the Examples too.
|
