RE: [exim] [Debian issue #244724] exim 4 uses double reverse…

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Autor: Eli
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A: 'Marc Haber', exim-users, 244724
CC: 'Marc Haber'
Assumptes vells: [exim] [Debian issue #244724] exim 4 uses double reverse lookup for indexing into client password file
Assumpte: RE: [exim] [Debian issue #244724] exim 4 uses double reverse lookup forindexing into client password file
Marc wrote:
> Hi,
>
> this is Debian issue #244724, which I currently consider a
> request for clarification.

...
> Looks like exim does a double reverse lookup on the target
> host name, and then uses the name obtained from that reverse
> lookup to obtain user name and password to authenticate with.
> I do actually find this unproductive in today's world where
> service providers frequently have service CNAMEs pointing to
> different machines to be able to re-route client requests for
> maintenance and repair. With exim doing that double reverse
> lookup, an ISP re-pointing its service CNAMEs will probably
> break exim clients authenticating.
>
> Is there a reason that exim does it this way that I have missed?


Using what configuration file? Exim does not do outbound SMTP
authentication when sending messages with its default configuration.

This "bug" looks like it is *entirely* a bug with the users configuration
file.

Eli.