How can I look up IP addresses for hundreds of hostnames in PowerShell?
I have a list of roughly 740 devices where I only know the hostnames. Is there a PowerShell script that can resolve each hostname to its IP address…
DNS lookup
Why is my SPF failing?
I sent an email using my domain hetnet.nl, but the recipient using Outlook is getting an SPF failure message. The SMTP IP addresses I used (195.121.94.135, 195.121.94.185, 195.121.94.138)…