I just noticed this in the logs, which might be from a valid sender to a valid user on this server:
Apr 5 11:03:31 postfix/smtpd[31021]: NOQUEUE: reject: RCPT from fep06.mfe.bur.connect.com.au[203.63.86.26]: 554 5.7.1 <fep06.mfe.bur.connect.com.au[203.63.86.26]>: Client host rejected: sender address does not match client hostname; from=<xxx...@yahoo.com> to=<y...@zzz.org.au> proto=ESMTP helo=<fep06.mfe.bur.connect.com.au> is this rejected because the sender must have 'from' in his mail client set to ISP's, somen...@connect.com.au and, reply-to to his desired xxx...@yahoo.com email ? -- Voytek
