I can mail myself if I am logged onto the machiner and all is OK.
i.e. exim -bt localuser@??? [All OK]
If I try
exim -bt reotue@??? {I Get}
/usr/local/exim/bin
# ./exim -bt reachus@???
reachus@??? is undeliverable:
unknown local-part "reachus" in domain "nslnet.net"
If I email remotely I get a bounce
========================
----- The following addresses had permanent fatal errors -----
<frd@???>
(reason: system config error)
----- Transcript of session follows -----
553 5.3.5 relay2.nslnet.net. config error: mail loops back to me (MX problem?)
554 5.3.5 <frd@???>... Local configuration error