Here is a specific for-instance:

Evolution does not send a FQDN in EHLO unless it has an FQDN.

Postfix for example is generally configured to require an FQDN from
email sender (as a spam prevention measure).

Therefore sending mail from Evolution via a reasonably configured
Postfix fails with libnss-myhostname.

Regards,

Daniel

On Sun, 2014-07-27 at 20:25 +0200, Joachim Breitner wrote: 
> Hi,
> 
> 
> Am Sonntag, den 27.07.2014, 13:53 -0400 schrieb Daniel Dickinson:
> > Package: libnss-myhostname
> > Version: 0.3-6
> > Severity: serious
> > 
> > Takes over names resolution of local host's name and causes apps that
> > need FQDN instead of just
> > hostname to fail (becuase myhostname fails to include a domain).
> 
> Can you explain the problems in more detai:
> What programs are affected?
> What precisely do these program look up, what do they expect, and what
> do they get with libnss-myhostname?
> Did they previously work out-of-the box without libnss-myhostname and an
> unmodified /etc/hosts, or did you have to modify /etc/hosts (i.e. add
> the FQDN there)?
> If so, what happens if you still add them to /etc/hosts?
> 
> 
> Greetings,
> Joachim
> 


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