text_combined: jonathan dill qcovkbaqnerdsnet james parra wrote suggest client ask clients vantage point server one rejecting mail need tread politely concerning removing reject_non_fqdn_hostname reject_non_fqdn_helo_hostname something want werent client wouldnt worry much must way could add exception maincf domain ip address sent email server would also reject would alone seriously wonder setting etcnsswitchconf check files first adding entry etchosts would fix eg 6422240195 nsky3com sure postfix verifies fqdn uses os resolver stack method jonathan tue 05 aug 2008 190522 0500 server rejecting mail single domain