I'm routing messages to a couple of servers with the transport map mechanism. I'm using recipient address verification to avoid bounce messages. This works fine with mail servers that send a 550 response, for example:
RCPT TO: non-existent-u...@somedomain.com 550 5.7.1 Unable to deliver to non-existent-u...@somedomain.com There are some mail servers with qmail that do not send an error response after RCPT TO:, but later after the "DATA" command: RCPT TO: non-existent-u...@somedomain.com 250 OK DATA 554 sorry, invalid mailbox name(s). (#5.1.1) In this case, a bounce message is sent to the sender. Is it possible to configure the postfix server to reject the message like in the first case? -Erwin
