Daniel Pocock <[email protected]> wrote: > A key point to consider for any filtering is the user experience when a > legitimate message is not delivered.
> This includes the following: > - does the sender know their mail was not delivered and do they get a > reasonable explanation? I've heard there are spam filters who give a > "user doesn't exist" error which is somewhat disrespectful to genuine > senders. I can understand the reason for this: Don't give the spammers any indication if an address is valid. But I have yet to see any solid evidence that it makes a difference if one responds with a "500 Your was classified as SPAM." or "500 User does not exist". Far more "damage" is done by clicking on any (so called) unsubscribe links in SPAM mails. > If the messages end up in a junk folder the sender has no idea. > Personally I think it is better to graylist or reject messages with a > basic explanation like "Your message could not be delivered because of > local policy" Exactly. > - does the recipient have to wade through a junk mail folder looking > for things that went there by mistake? In this case, I feel the spam > problem hasn't really been solved at all, the user still has to do the > work sifting through spam to find the ham and it is still a painful > overhead for them. Some people want to operate this way. > In some countries and certain industries a lot of companies have > simply started using cloud solutions from some of the large vendors. > They tend to get all the messages from companies in their industry on > the same platform, but I noticed that one of them was incorrectly > putting mail that had come from one of my Debian mail servers into > their junk folder. Their IT manager spent a lot of time chasing the > vendor to find out why this was happening and they never got any valid > answer. It was frustrating for them and for people sending the mail. > The vendor would just say that they have to keep their policies > secret. Also exactly the reason why we $here decided to do the heavy lifting ourselves instead of buying a ready-made appliance. S° -- Sigmentation fault. Core dumped.
