Unknown Address Error 554-sorry, Message Looks Like Spam To Me I Can't Receive E-mails (sender Receives Error Message) How Can I Get Support About It ?

I can't receive e-mails (sender receives error message) How can I get support about it ? - unknown address error 554-sorry, message looks like spam to me

Various people have told me that my address yahoo.ie by an error back: Error 550-SO address denied'relaying \\ \\ \\ \\ \\ \\ \\ \\ u0026lt; myaddress> '
It started happening recently.
- Do you have similar problems in these days?
- How can I help solve Yahoo to this problem?