Cant send emails in outlook

Cant send emails in outlook

I am able to receive any emails i send to the address but i cannot send out of them on any computer, phone or device.
What is the way to fix this issue as its really frustrating for a business email. comes with error 0x800CCC13 cannot connect to the network.

This happens on any computer and have done the outlook troubleshooting, also it wills end outlook test email fine when adding the account.