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.




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