Not sure what the problem is. I googled for a few minutes and found that a 421 error means that the service is not available. It must mean that they are having some server issue. Have you tried contacting their tech support? -Robeto
I've since started getting __alloc_page errors. So I think there is another problem I've not noticed till now. The __alloc_page errors are accompianied by 'VM: Killing process spamassassin'. So something else is happening too. I'm thinking I might be best to try to start a new machine from scratch and try to move to Exim4 properly (I've been meaning to do this for a while anyway). Kelly