I recently created a new MailInABox server on Digital Ocean.
I immediately got badly rated by CSI (Cloudmark). I contacted them and they said the following:
Please contact your hosting provider, there are recent reports of spam passing through this server. Let us know when the source of this spam has been stopped and we can consider remediation. Below is a sample header that you can forward:
Received: from dtysd5k60b.emoong.live ([22.214.171.124])
From: =?utf-8?q?=53=6d=c3=a4=72=74=61=20=6b=6c=61=67=6f=6d=c3=a5=6c?= 7Z0IX988@dtysd5k60b.emoong.live.728.732
Subject: Ta bort dina ledproblemen inom 7 dagar!
I don’t understand how I can block that.
What I did is use the firewall to block more and not allow port 25 SMTP at all and only allowed some of my server to send email through 587 (SMTP submission) through my new email server.
But blocking 25 seems to also block any incoming email to my MailInABox. This would be blocking the above “emoong.live” from using my server to send emails, but it also blocks everything else…
CSI said I should contact my Host to report abuse, which I did but there must be a way to block this within my MailInABox?