At the weekend there is a PowerShell script with which a domain can be tested in the event of mail problems:
The script returns the MX, PTR, SPF and DMARC entries of a domain and checks whether one of the IPs is on a blacklist. It also checks whether port 25 (SMTP) is accessible.
The script is simply called with the domain to be checked as a parameter:
.\Test-MailDomain.ps1 -Domain name frankysweb.de
The script can be downloaded here:
