Too much unknown info here.
What is the domain that is being blocked?
What is your domain?
How do you get your email? webmail or Email app (if so what app do you use)Outlook for windows, Outlook as part of MS Ofc, other?
What makes you think a particular domain is blocked?
Screenshots are helpful
We are with BT and the domain blocked on one PC is 'btinternet.com'
btinternet.com is our domain....ie our email addresses are:-..... [email protected] and [email protected].
MS Edge.
Hope that's enough?
Here on the other side of The Pond, Comcast/Xfinity sometimes blocks its own domain. Emails sent to my wife are rejected. Comcast relies on a third-party spam domain blocking service. It's all very opaque, maybe by design.
My Computer
At a glance
Windows 11 2H25AMD 9900X64 GBAMD 9070 XT
OS
Windows 11 2H25
Computer type
PC/Desktop
Manufacturer/Model
DIY
CPU
AMD 9900X
Motherboard
MSI X870E Carbon
Memory
64 GB
Graphics Card(s)
AMD 9070 XT
Sound Card
built-in
Monitor(s) Displays
Dell 24"
Hard Drives
Sabrent 1 TB NVMe, 4 x SSD (need to check models), 4 x 3.5" HDD, 8-16 TB, all WD
PSU
Seasonic 850
Case
Fractal Design North XL (which I likw)
Cooling
Corsair AIO for CPU, fans for case
Keyboard
Das Keyboard 4
Mouse
Corsair M65 (white)
Internet Speed
1 TB download
Browser
Firefox
Antivirus
Bitdefender
Other Info
Also have Lenovo T14S laptop (me) and Lenovo Slim 71 (wife)