Hi,
Related to my earlier post, we have a CDB file holding rewrites to
/dev/null. I've just been scratching my head trying to figure out a
customer problem; I've ended up using a work-around, but clearly I'm
missing something so I seek enlightenment.
CDB file, keyed by domain, result is address-list; so:
devnull_filtering:
driver = smartuser
transport = devnull
domains = cdb;DEVNULLCDB
local_parts = $domain_data
If the $domain_data is something like:
fred:barney:wilma
then this works fine -- mail to fred@, barney@ and wilma@ disappears
down the bitbucket.
If the $domain_data is something like:
^.*[0-9]+.*$
or:
! ^(postmaster|fred|barney)$
then it again works; in the former case, addresses with a digit in the
LHS are filtered (spammers commonly fake their sender to be something
like <GarbageAndDigits@???>, so this is one
solution which customers like); in the latter case, only mail for
postmaster@, fred@ or barney@ is accepted, everything else experiences
terminal bitbucket syndrome.
If the $domain_data is something like:
^.*[0-9]+.*$:ebay:sales
then again, this works as expected; mails to ebay@, sales@ and
anything-with-digits-in-it@ is filtered to the bitbucket. Everything
else is accepted.
Now, if $domain_data is something like:
! ^(postmaster|webmaster|valid_1|valid_2)$:fred:barney
then this doesn't work; the "fred" and "barney" are redundant, so the
work-around was to remove them, but I don't see why foo@ failed to
match. It seems that the negated regexp only works if it's not part of
a list.
This is Exim 3.36; any pointers much appreciated.
Ta,
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