> Claudio Jeker wrote: >> On Wed, Feb 02, 2005 at 06:22:47PM +0100, Andre Peitz wrote: >> >>>spamcop.net is blocking mailservers when bounces arrived at spamtraps. >>>This means, that the behaviour of qmail-ldap will result in a listing on >>>spamcop.net. >> >> Those guys at spamcop are insane. The have no clue about how mail works >> and should fix their spam traps. If this is true they definitifly have a >> quality problem. > > http://www.spamcop.net/fom-serve/cache/329.html#bounces > Yes, you are right. There is no technical skill. My dicussion with the > deputies of spamcop was not a really discussion. > There was no interest in a discussion. > > > >>>We use RCPTCHECK but user over quota bounces will go out and in worste >>>case to the spamtraps of spamcop.net. When this happen, the mailserver >>>is blacklisted. Forged from addresses in spam/virus mails are today the >>>normal way. >>> >> As I said it's a spamcop problem that spamcop needs to fix. A bounce >> needs >> to be sent if anything goes wrong after the mail got queued. This is how >> the mail system works. > > Yes, but spamcop.net said, that mails have to be dropped during the smtp > connection with a 5xx. And when our mail server is blacklisted, our > users are not interested in who is technical correct. They will only see > that our mailserver is listed. And spamcop is used worldwide a lot of > times. And funny people think it is a good idea to block mails only on > spamcop listings. > > >>>So what to do? My oppinion is a patch similar to RCPTCHECK which check >>>the quota and send a 553 during the smtp connection. Any ideas why this >>>is not a good idea? Any other suggestions? >> >> No good idea as it is unfeasable. To check the quota of a user way more >> needs to be done than just query that ldap db. One of the task that >> would >> be needed is switching of user and I don't like to do that in the smtp >> porcess. Also it would cause way more load and is inaccurate. > > Yes, that was my first idea. I realise also that this is not a good > solution. > > >> Other suggestions. Blame spamcop. Make it public, tell everybody how >> stupid they are and that the great anti-spam youngsters from spamcop >> have >> no clue how mail works. > > Im sure that people who block mails only with spamcop are not interesset > in this. It worked in their eyes. That burning down the server has the > same effect is not interessting. > > So what to do when one of the largest blacklists will list your > mailserver beacuse qmail-ldap send bounces ;-)
I think spamcop once had page that said "don't use bl.spamcop.net for RBL. Use it for tagging only". Today I can find only http://www.spamcop.net/fom-serve/cache/297.html "The SCBL is an aggressive spam-fighting tool. By using this list, you can block a lot of spam, but you also may block or filter wanted email. Because of this limitation, one should strongly consider using the SCBL as part of a scoring system and explicitly whitelist wanted email senders (e.g., mailing lists and other IPs from which you want to receive email)." I think, due to modular structure of qmail, you can't calculate user quota during smtp stage. -- Tomas
