Email Sending not working in newer Version

Issue Summary

So i am trying to invite some people to my Blog and i cant send out any Emails because of queryA EREFUSED

This is the Full Error:
{"name":"Log","hostname":"vServer-5r6Z6","pid":2468556,"level":40,"msg":"Error sending email: Failed to send email. Reason: queryA EREFUSED Please check your email settings and resend the invitation.","time":"2021-10-04T15:23:37.235Z","v":0}
The strange Thing is that it works perfectly fine with 1to1 the Same Settings on a Ghost 4.13 Installation

Technical details:

  • Ghost Version: 4.17.1
  • Ghost-CLI version: 1.17.3
  • Node Version: v14.18.0
  • NPM Version: 6.14.15
  • Browser/OS: Chrome 93.0.4577.99 via Vivaldi 4.2.2406.54 running on Windows 10
  • Debian 11
  • Database: MYSQL Ver 8.0.26 for Linux on x86_64

Okay so i checked the Logs and it says that the Problem is at at QueryReqWrap.onresolve [as oncomplete] (dns.js:210:19) which is the DNS Resolver i guess. So i did a nslookup but it works completely fine???