[Bug 180551] Re: Postfix myhostname defaults to uname() not gethostname().

[Robie Basak]

So...

gethostname(2) is supposed to return an unqualified name (on Debian and
Ubuntu at least).

The Postfix docs say that "The default is to use the fully-qualified
domain name from gethostname()." but gethostname() on Debian and Ubuntu
will never return a fully-qualified name.

hostname -f returns the result of getaddrinfo(2) on gethostname(2), as
defined in hostname(1).

Postfix, when $mydomain is not set and when the result of gethostname(2)
is unqualified, appends ".localdomain", when you instead expect it to
use what "hostname -f" returns and thus to use the result of
getaddrinfo(2) on gethostname(2).

Sounds like a question for upstream to resolve to me. Can someone check
this issue is still current upstream and check for and/or file a bug
upstream as appropriate, please?

** Tags added: needs-upstream-report

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Title:
  Postfix myhostname defaults to uname() not gethostname().

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