Hello, I have two servers (VPS) with websites and the servers also serve some mail for different domains. Some months ago I had a problem that Microsoft blocked the mail from all my domains. That was solved, MS likes my servers again. But now Gmail sends all my mail to the SPAM folder of the receiver. I found some support message at the site of the VPS supplier saying "setup DomainKeys Identified Mail (DKIM) and SPF", would that help? I am using Centos 7.4 and ISPConfig 3.1 Regards, Rob
Yes, dkim might help. you can enable dkim in ISPConfig for the domain and then publish the dkim record in dns. There might be an issue on centos in dkim setup, you might check out this report: https://git.ispconfig.org/ispconfig/ispconfig3/issues/4035#note_63168
spf is something different which is often used in combination with dkim. SPF does not require you to install something, it's just a DNS record that describes which servers are allowed to send email for your domain.
