Robert Lopez wrote: > We get a lot of spam from a marketing company that uses hundreds of ip > addresses and hundreds of domain names but it always comes from > "support" at which ever names they are using that day. > > My supervisor wants me to block all email coming from "supp...@*". > > I have concerns about blocking legitimate email. > > Which postfix list would be best used for such a block? Could it be > sender_access? >
This is "a bad move". Also remember, just because it says "support@" in the To: field, that is just a header. Postfix sees envelope senders differently. Check logs and Received-By headers for what is really happening. A good spam software such as amavisd-new calling SpamAssassin, or SA by itself, along with rbls will significantly reduce all spam. A great rbl to start with is zen.spamhaus.org. Just be sure to read their terms.
