Julian Mehnle wrote: > > In the "old times" of the Internet where a.com (everybody) could send a > message and claim it to come from x.com, forwarders would have to take no > responsibility for what domains are used as the sender addresses of the > mail they forward. As a result, everybody could simply claim to be a > forwarder and then go ahead faking sender addresses happily.
It is still not clear why one would rewrite senders. SPF should work if everybody takes the burden of declaring what are the mail servers they use. (Unfortunately one cannot be vague: I would thoughtlessly authorize anyone to throw any mail claiming to be mine an not sent from european servers - and I can sue european abusers.) One case is when the forwarding server is a bastion forwarder. Then it should rewrite addresses in order to let the inner servers play SPF too (not much useful.) ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8 _______________________________________________ courier-users mailing list [EMAIL PROTECTED] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
