Laurence> End users ought not to have the functionality of email Laurence> destroyed because originating SP's won't show due Laurence> diligence in preventing abuse of the network. This is crisis mongering of the worst sort. Far more damage has been done to the functionality of email by antispam kookery than has ever been done by spammers. I have one email address that has: Existed for over a decade. Been posted all over Usenet and the Web in unmangled form. Only three letters so it gets spam from the spammers that send copies to every possible short address. All blacklisting turned off because that was causing too much mail to go into a black hole. In short it should be one of the worst hit addresses there is. All I have to do to make it manageable is run spamassassin over it. That is the mildest of several measures I could use to fix the "spam problem". If it became truly impossible I could always fall back to requiring an address of the form "apoindex+<password>" and blocking all the one's that don't match the password(s). That would definitely fix the problem and doesn't require any pie in the sky re-architecting of the entire Internet to accomplish. For almost a decade now I have listened to the antispam kooks say that spam is going to be this vast tidal wave that will engulf us all. Well it hasn't. It doesn't show any sign that it ever will. In the meantime in order to fix something that is at most an annoyance people in some places have instigated draconian measures that make some mail impossible to deliver at all or *even in some case to know it wasn't delivered*. The antispam kooks are starting to make snail mail look good. It's pathetic. The functionality of my email is still almost completely intact. The only time it isn't is when some antispam kook somewhere decides he knows better than me what I want to read. Spam is manageable problem without the self appointed censors. Get over it and move on.