On 15.2.2008 0:25, -=Devil_InSide=- wrote: > callback - a check of sender. > when local mail server recieve message, it temporary stop recieving after > any header ( "to" usually) and try initialize simulation session of sending > mail to adress $from. > if remote server hasn't that address in recipient's list, the incoming > connection is closing and incoming mail rejects hard (usually). >
Which is a very bad idea. For many reasons: - Blacklists etc. create havoc with the checking - Timeouts - It is extremely easy to conduct DDoS against a mail server, if this becomes widespread (think a spammer sending a large number of spams forging your domain, which is bad even now, and it'll be a disaster if everybody used callback). Probably there are other reasons I haven't thought of esa ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
