On Tue, 17 Sep 2002, Russell Wilton wrote:
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
> test.user@???
> SMTP error from remote mailer after RCPT TO:<test.user@???>:
> host polaris.netsrv.uleth.ca [142.66.ccc.ddd]:
> 550 unknown user
>
> The sender knows that "test.user@???" is a valid address and thinks
> there must be something wrong with the mail system. Confusion ensues.
Well, in some sense there _is_ something wrong. :-)
1. You can set hide_child_in_errmsg.
2. You can customize bounce messages (chapter 40).
But consider. Suppose A is aliased to B and B gets sent to a different
host and *then* fails. The sender is still going to get a message about
failure to deliver to B. So the best you can do is to catch some of the
cases.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
