We are using amavisd-new (amavisd-new/oldstable,now 1:2.10.1-4) to filter both incomming and outgoing e-mails.
The thing is we receive a log of spam with fake sender from our domain. Since we have less than 100 accounts in our system, is there a plugin that can take the sender address then check it against a valid list of senders? Thank you a lot.
our system configuration is:
If spamassassin checks outgoing email then perhaps a local rule that checks for allowed senders such as:
header LOCAL_WHITELIST From =~ /(me)|(you)|(etc)@mydomain.org/
meta LOCAL_WHITELIST_MATCH ((LOCAL_WHITELIST) =1) score LOCAL_WHITELIST_MATCH -1.0
meta LOCAL_WHITELIST_MISS ((LOCAL_WHITELIST) =0) score LOCAL_WHITELIST_MISS 1.0
Unfortunately, I have no idea how to do this just for outgoing email.
It should be straightforward to write a shell script that automatically generates the white list for you and creates the above as a whitelist.cf for spamassassin. That would be cool. Especially if you could get it to run automatically after the creation or deletion of an email account and then amavisd-new reload && service amavisd-new restart.
