Nastavenie postfixu

Zdravim,

chcel by som rozbehat postfix, ale pri posielani mailu z mojho pocitaca s postfixom mi vypise hlasku typu
Apr 30 12:05:45 osobita postfix/smtp[25537]: BF4C4A6DC7A: to=<kstano@pobox.sk>, relay=none, delay=0.05, delays=0.03/0.01/0.01/0, dsn=4.4.1, status=deferred (connect to mx3.mail-atlas.net[194.212.229.244]: Connection refused)

Co musim mat nastavene, resp. aky musi byt nazov domeny (je tam registrovana domena, ktora funguje napr. na ping, www...), aby mi to dorucovalo, resp. prijimalo maily?

Dik