Bug#430157: "unknown user" inappropriate for general vague failure message

[Philip Hazel]

On Sat, 23 Jun 2007, jidanni at jidanni.org wrote:

> Package: exim4-config
> Version: 4.67-3
> 
> >> Also it seems a shame that exim says "User unknown" while the real
> >> problem is logged only in mainlog. 

The text "User unknown" does not appear anywhere in Exim's source code. 
If any Exim installation is emitting it, it is because the configuration 
file has used that text. The default message for an unrouteable address 
is "unrouteable address".

However, I believe there are (or were) other MUAs/MTAs that overwrite
whatever message comes with a 550 error, replacing it with "User
unknown". There were certainly cases of this in the past.

> So therefore one hope exim will not say, by default, "Unknown user",

It does not. At least, not as distributed by the Exim maintainers.

Philip

-- 
Philip Hazel, University of Cambridge Computing Service.