We'll be deploying a mail server on a Rackspace cloud server, and they suggested that because their offering is 'utility computing' the IP addresses included are dirty (in a blacklist kind of way) and we should use a commercial ESP such as SendGrid, PostMark, CritSend, CloudSMTP, or the like.
Has anybody done research in this field? Any favorites? We'll just be forwarding our outgoing SMTP traffic to their service for its quality of deliverability. I doubt we'll use any of reporting features, or even SPF/DKIM. Quinn -- Strangecode, LLC http://www.strangecode.com/ +1 530 636 2633
