Hi aliraza9074,
I’m sorry to hear you’re experiencing email deliverability issues — this is becoming more and more common across the internet, unfortunately. The core of the issue is spam — spam is becoming increasingly common and clever, and email providers are constantly trying to improve their algorithms for blocking it. However, this means that legitimate emails sometimes also get marked as spam, or don’t get delivered at all.
This can be resolved with an SMTP plugin, which changes how emails send to make them more clearly legitimate to email providers.
We have a great tutorial, How to Fix WordPress Contact Form Not Sending Email With SMTP, which lists all of our top recommended SMTP options and has a specific tutorial for each.
I hope this helps! Could you give one of those options a shot and let us know if you have any questions? 🙂