i have the some problems with some domains, the error i get is:
Code:
postfix/smtpd[10766]: NOQUEUE: reject: RCPT from relay.someisp.tld[xxx.xxx.xxx.xxx]: 554 <user@domain.tld>: Relay access denied; from=<user@domain.tld> to=<user@domain.tld> proto=ESMTP helo=<relay.someisp.tld>