I currently having this issue. I bought domain (dynamiconcepts.co) and hosting here in GoDaddy. After that Ive parked to domains (dynamiconcepts.pe and dynamiconcepts.com.pe).
After creating emails with different domains. Im only currently having issues with the dynamiconcepts.pe domain. It seems that something is wrong, using webmail I can send emails from dynamiconcepts.pe email to (For example: gmail) emails . But when I reply from Gmail or any other email provider to my dynamiconcepts.pe email I get this error: