Max-Julian,
> I am finetuning our spam filter and wondered what exactly will be
> substituted in place of %k and %a and what other replacements might be
> available.
>
> But to my surprise, I could not locate any such documentation.
>
> Could please someone provide a big red, flashing pointer to the place
> where such replacements are documented?
> I am obviously too challenged by modern search technology.
Use the Source, Luke! :)
(actually it was also mentioned in release notes when introduced,
and in amavisd.conf-sample (but I see the %a is missing there,
will update it) ).
# The SQL select clause to fetch per-recipient policy settings.
# The %k will be replaced by a comma-separated list of query addresses
# for a recipient (e.g. a full address, domain only, catchall), %a will be
# replaced by an exact recipient address (same as the first entry in %k,
# suitable for pattern matching). Use ORDER, if there is a chance that
# multiple records will match - the first match wins (i.e. the first
# returned record). If field names are not unique (e.g. 'id'), the later
# field overwrites the earlier in a hash returned by lookup, which is why
# we use 'users.*, policy.*, users.id', i.e. the id is repeated at the end.
# This is a legacy variable for upwards compatibility, now only referenced
# by the program through a %sql_clause entry 'sel_policy' - newer config
# files may assign directly to $sql_clause{'sel_policy'} if preferred.
#
$sql_select_policy =
'SELECT users.*, policy.*, users.id'.
' FROM users LEFT JOIN policy ON users.policy_id=policy.id'.
' WHERE users.email IN (%k) ORDER BY users.priority DESC';
> In particular, I was looking for a substitution to put the the email
> address value from the RCPT TO smtp command into the sql statement.
> (email are sent to amavis from postfix. postfix does a lot of checking
> so I consider trustworthy to use)
The %a would do just that.
Btw, the recipient address is always correct by definition.
> But judging from various examples found via google, %a or %k might not
> be what I am looking for.
I believe the %a is what you are looking for.
If not, please explain.
Sorry for delay
Mark
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