> I did run my own server with properly setup DKIM and SPF and all Ah. But the million dollar question is WHERE did you run that server? If you ran it off you

> I did run my own server with properly setup DKIM and SPF and all Ah. But the million dollar question is WHERE did you run that server? If you ran it off your home connection then there's your problem. Pretty much everyone on the receiving end (ISPs, corporates etc.) will either block or assign a low reputation to home ISP IP ranges. So basically you can do all the DKIM and SPF you like on your home MX server, but you're going to have the high hurdle of your untrustworthy IP range to fix first ! EDIT: Just saw you said "cheap Scaleway" ... well that's a similar sort of problem. Perceived "spammer friendly" hosts tend to be assigned a low rep in spam scanning. You won't be auto-blocked like residential IPs are, just a low rep set. (for any lawyers reading, I am NOT making any comment on Scaleway here, I am speaking in general terms !)