james parra juhssvmusicreportscom hello client month getting following error sending mail us following recipients could reached oyopvgiourdomaincom 282008 417 pm smtp communication problem recipients email server please contact system administrator helo command rejected need fullyqualified hostname postfix log says following feb 8 122104 postserver postfixsmtpd22189 warning 6422240195 address listed hostname nsky3com feb 8 122105 postserver postfixsmtpd22189 noqueue reject rcpt unknown6422240195 504 helo command rejected need fullyqualified hostname protoesmtp helo add maincf allow ip address domain access many thanks advance james tue 05 aug 2008 160413 0800 server rejecting mail single domain