On Wed, 2010-02-17 at 02:07 +0100, Mark Martinec wrote: > > > Look at grey-listing as well. It should be useful if it can distinguish > > > between the user's MUA (or private MTA) and a bot. > > MUAs generally don't cope well with greylisting, as they lack good > mechanisms for automatic retries - so I'm not sure that's a good advice. > I wondered about that as I wrote it. IIRC I've seen the equivalent while I was working out how to set up my system. The likes of Evolution tend to report the error and leave the message sitting in the outbox. Thats a good indication of trouble provided you notice its still there.
> T&C = terms and conditions. It's your call to set rules of the game. > > Tell the clients that for a little effort on their part turning on > the SASL authentication and submitting through standard mail submission > ports, they will be gaining a better service with more reliable > acceptance rate by their recipients. > I was also suggesting something along the lines of "we'll still permit non-authenticated connections but we'll charge 100% more for that privilege". Martin