I just see a number of these entries: Apr 13 20:45:37 postfix/smtp[31121]: D1F8DB4491F: to=<d...@domain.com.au>, relay=mail4.barnet.com.au[202.83.178.125]:25, delay=54911, delays=54902/0.04/5.4/3.9, dsn=4.1.7, status=deferred (host mail4.barnet.com.au[202.83.178.125] said: 450 4.1.7 <apa...@sbt.net.au>: Sender address rejected: unverified address: host bilby.sbt.net.au[116.197.145.51] said: 550 5.1.1 <apa...@sbt.net.au>: Recipient address rejected: User unknown in virtual mailbox table (in reply to RCPT TO command) (in reply to RCPT TO command))
mx for the 'd...@domain.com.au' domain is 100 mail5.barnet.com.au 202.83.178.78 200 mail4.barnet.com.au 202.83.178.125 am I correct that: the form email has apa...@sbt.net.au as sender; barnet.com.au attempted to verify 'apa...@sbt.net.au' on bilby.sbt.net.au; bilby replied 'user unknown', which then caused barnet to reject the email? is form mail that has such a 'system address' like 'apache@', with such mailbox not present 'at fault', or is the remote server 'too strict' in attempting to verify such a sender email ? -- Voytek
