I can't send emails

I can’t send emails, just receive, there is no apparent error, the email even goes to the “sent” ones, but it doesn’t reach the destination!

Ask your host if they are blocking port 25, check your reverse PTR etc.

Port 25 is open, how to configure reverse PTR ?

If you have a VPS it is usually set in the VPS control panel, if not you will need to ask your host

If the reverse is not the same as your forward DNS emails will be rejected.

You can check by entering your domain here.

https://intodns.com/