Email routing configuration (from OUT to IN: private Mail Server)

Job ID: 38640091

Budget: €8 – €30 EUR

I'm seeking an expert of mailserver logic
Server is Windows 2019, access allowed via AnyDesk (or Teamviewer) only

The instance was created 3 months ago, setting up a single test domain. Everything works (POP, SMTP, IMAP) with and without SSL

Added new domain: now email sending IS WORKING BUT receiving emails does not work.
I think it's just a PTR and SPF problem.

Issue already managed in the past in less of 30 minutes.
Low budget available (less than 40 euro)
Related categories: System Admin DNS IIS Email Handling Internet Security