Unable To receive E-Mails

[mizzajel]

I‘m not getting any E-Mails to my Email address (my own domain on Gmail) - when I send an Email with another E-Mail address to this one, I receive a notification that the Mail couldn‘t be delivered (although I pay monthly for the domain)…

The tips I found on Google are useless (no storage, Spam,…)

Please help me

[Penelope]

If I can make a suggestion...I know you said you received a mail not delivered error message but maybe quoting what it said entirely might be useful (blur out personal sensitive information of course) but sometimes though error messages can include things like error codes, saying the domain doesn't exist, etc, etc so that is why I am pondering if the error messages is saying more than a simple "not delivered" message. 

And that is great tp share that you have already completed the steps in https://support.google.com/a/answer/11112228?hl=en and https://support.google.com/a/answer/1071514?hl=en.