Sophos Virtual Email Appliance - It would be very useful to be able to customise the rejected email message for an unknown user account. Currently it replies with internal mail server information in the message and we would like to remove this from the reply.
e.g.
550 5.1.1 <address@domain.co.uk>: Recipient address rejected: undeliverable address: host mail.domian.co.uk[192.168.1.2] said: 550 Unknown user (in reply to RCPT TO command)
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