On Fri, Jul 31, 2020 at 08:00:32AM -0400, Henning Follmann wrote: > On Fri, Jul 31, 2020 at 12:59:06PM +0530, Didar Hossain wrote: > > Hi, > > > > I want to host my own email on the cloud - I don't want to use G Suite or > > any > > other commercial service because I would like to have control over my email. > > > > I read around a little and it seems that most cloud providers block SMTP > > ports > > (25,587,465) from/t the internet as well sometimes from within their > > network. > > This poses a real problem for my deployment plans. Also, note that my > > design has > > separate MSA (submission), Mailstore (IMAP) and MTA (MX) nodes. > > > > I have shortlisted Digital Ocean and Linode for my use because both of > > datacenters in India. Is anyone using either of them for MX service? > > > > Any and all feedback is most welcome including specialist/small VPS > > providers > > who I can consider to host the MX node for my domain at least. > > > > I think all ISP should be fine. I sometime feel for a mailserver it is > more important to have a decent DNS provider than where you actually > run your mailserver. Because as a minimum you want to set up > SPF and DKIM. > Most ISP require to register an outgoing mail server with them. This > is also important that they set up a reverse ptr for your host.
Cheap US$5 cloud instances are super attractive propositions for spammers who have absolutely abused these providers and made it difficult for legitimate senders to host on them. I have DNS, SPF, DKIM and DMARC under control. But, IP/ASN reputation is something that I have to factor in because a lot of my counter party receivers are on Office365 and G Suite who would block ill reputed networks. > One note on Digital Ocean. In my experience there is a lot of spam > originating from Digital Ocean. This potentially could cause you > some trouble. But this might be just my personal "feeling". I never > ran the numbers on ISP spam submission rates. True, I remember seeing some statistics about spam originating from them and that is why they have recently started blocking ports 25 throughout. > I currently use AWS for my mailservers. In the past I used > A1flexus for dedicated servers. They are on Long Island > and were very "linux friendly" at that time. Does your AWS instance receive and send over port 25? Kind regards, Didar -- Sun in the night, everyone is together, Ascending into the heavens, life is forever. -- Brand X, "Moroccan Roll/Sun in the Night"