my emails cannot be delived i keep getting this error,

SMTP>> MAIL FROM:<[email protected]> SIZE=3045
SMTP>> RCPT TO:<[email protected]>
SMTP<< 250 OK
SMTP<< 451 Temporary local problem - please try later
SMTP<< 503 valid RCPT command must precede DATA
== [email protected] R=lookuphost T=remote_smtp defer (0): SMTP error from remote mailer after RCPT TO:<[email protected]>: host []: 451 Temporary local problem - please try later

my /etc/localdomains are fine i tried using /scrpits/mailperm but is still the same

i've checked around and i found out that i dont have an exim username? what's the command to add the user to a proper exim dir and permission? cause i tried going to /dev/null and i get permission denied

exim probably cant write to the mail dir
ihad this problem
make sure u have an exim user
then make sure the dir where mail is stored has the correct permissions for exim
how can i do that?

thanks in advance