Mail server is rejecting...


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well ah crap, i own a website and im trying to set up my POP3 email on it, for some reason i can send email but not receieve, ive checked dns, and my nameservers and mx entries are set up correctly but when checking if nameservers are working i get an error, same error for all 3 of my mx entries

WarningThe mail server rejected an email sent using a 'mail from' address of '' when it should not have ().

Any ideas? im not sure why this is happning i just want my pop 3 to work