Quoting Mark Foster
Thanks Steven. I'd done a bit of looking myself and come to a similar conclusion, thus having completely ignored the advice rendered.
thanks for the various posts that pointed me to the troll :-)
Sadly no other significant useful advice has been rendered as yet - so my original problem remains.
well, solutions for this problem simply do not exist as a general thing, the decission here has to be made on a case by case basis. i worked many years ago for a company in the automation business. we had lots of contracts with siemens and bosch and all that kind of very corporate things. mail has been an important part of the communication and spam has been a problem. i decided that it is no problem to blacklist AOL as none of our customers would use AOL servers. i blocked all IP ranges they used and spam level dropped significantly, but more important, no one complained. not so many years ago i worked for a big ISP and we had about 250.000 customers, most of them privat users with all kinds of AOL/Yahoo/GMX addresses. on top of that we were the domain portal for yahoo in germany. blackholing yahoo would have been an extremely bad idea but also the AOL blacklist would have killed a significant percentage of our customers.
Or is it yet another case of 'just filter it, nothing we can do' ?
depends, if it is a corporate envionment, think of blackholing or at least of spamassassin or spamd or something simmilar. in an ISP environment things are different as there might be legal things to take into concern as well (are you allowed to filter mail by contents). appart from that, reporting the mail as spam at the various blacklists keeps at least the admins busy ... greets lenz