It's not "your" IP address, it's DigitalOcean's IP address. And DigitalOcean is unwilling or unable to police their IP address space, so you've been lumped in with the other bad actors inside 45.55.0.0/16.
There are lots of hosting providers that actually respond to abuse reports, and thus have good email deliverability. DigitalOcean isn't one of them. (I say this as someone who has repeatedly reported spam and malware C&C to them, and AFAIK those reports went to /dev/null.)
>It's not "your" IP address, it's DigitalOcean's IP address. And DigitalOcean is unwilling or unable to police their IP address space, so you've been lumped in with the other bad actors inside 45.55.0.0/16.
It's not an arbitrary search space, it's usually a /24 to easily disqualify noisy neighbors and in addition the reputation of ips registered in the ARIN record. I would urge everyone to register any IP block they use that's more than a /29. To the end of this story, I have successfully sent email to microsoft servers from my /27 and /28 because (a) the /24 i'm on is not spammy and (b) my entire netblock is not spammy.
But even then I get certain random companies/universities that will flat out reject my email because I'm not going through one of the big 5 mail senders. I gave up, still host my own email but relay my mail through an O365 exchange server
The problem is Microsoft is unwilling to unblock you even if you contact their support and jump through all the hoops to show you aren't a bad actor. They are of course incentivized to do this by cost cutting and in the hopes people will use their service rather than self host.
I don't want to further incentivize their behavior so I refuse to use them. All my self hosted emails go to Apple and Google inboxes just fine.
Exactly this. I self-host and blanket block a bunch of hosting providers because I get 100% spam from them. Just a few hosting providers that seemingly are unable to police their address space seem to be responsible for a big proportion of it.
If sending outbound email it's important to use a provider that itself has a good reputation. Just trying to develop a reputation for your own range isn't sufficient if your supplier has a bad reputation.
There are lots of hosting providers that actually respond to abuse reports, and thus have good email deliverability. DigitalOcean isn't one of them. (I say this as someone who has repeatedly reported spam and malware C&C to them, and AFAIK those reports went to /dev/null.)
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