> when the IP range it's on becomes greylisted in UCE-PROTECT -- which happens every so often This is a common complaint with Linode specifically, but probably

> when the IP range it's on becomes greylisted in UCE-PROTECT -- which happens every so often This is a common complaint with Linode specifically, but probably fairly common with low-cost virtual server providers in general. It's worth looking into the history of your IP before you start using it to host mail, and if it's feasible, shelling out for a dedicated server (ideally from a provider that doesn't also offer virtual servers, or has enough network separation between them) makes it much less likely that your neighbour is a spammer. Mine's never been on UCE-PROTECT.