Mail receiving problem - 554 5.7.1

[Julian170]

Hello everybody,

I'am here because of a problem with my MS 365 Business Abo. I try to connect my Webspace to use the Mail Service. If I try to send one from Outlook, it works! If I try to send a Mail to my Outlook then there ist this error:

Spoiler

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of
its recipients.
This is a permanent error.

The following address failed:

name@domain:
SMTP error from remote server for RCPT TO command, host: mail.domain (IP) reason: 554 5.7.1 <name@domain>: Relay access denied

I installed a Connector & All my DNS Settings are correctly, so MS.
Anyone had the same Problem?

Thankyou

- Julian

[#2]

@Julian170 

554 5.7.1 indicated that the message was rejected by receiving mail server, may conduct a message trace if under your tenant