[daneel_w]

That's their cost for a dedicated "clean" transit. At $15/mo you're just sharing tenancy with everyone else, using their SMTP setup together with everyone else. I'm running my own setup for a handful of domains, my own configurations, signing procedures, filters, features, aliases and catchalls etc. Incidentally almost all spam I receive comes in via Gmail, Yahoo and Hotmail.

[mekster]

What matters is how inbox providers look at the source IP. At least delivery services have higher chance by filtering obvious outgoing spam than a rogue server IP.

[daneel_w]

My problem isn't the network I'm originating from. It's a) that Proofpoint doesn't track "state" (message-IDs) between outbound and returning e-mail, and b) that I don't send regularly enough to be a "familiar".