It is notoriously impossible to host your own email. Large email providers have created an oligopoly of email "quality" acceptance, and there's effectively no way to get your deliverability to a reasonable rate unless you use one of them.
I don't think it's necessarily malicious in nature - more the product of spam filtering.
I wonder if email authentication methods like DKIM/SPF/etc.. help this problem these days.
I don't think it's necessarily malicious in nature - more the product of spam filtering.
I wonder if email authentication methods like DKIM/SPF/etc.. help this problem these days.