Solved: Machine name: localhost

David Abrahams dave at
Sat Sep 9 21:34:03 UTC 2006

David Abrahams <dave at> writes:

> I've enclosed headers from when I send email to the same address (and
> Cc myself) in the two situations.
> What I notice is that when it doesn't work, the Return-Path and Sender
> headers are "dave at localhost."
> And note that I'm not just arbitrarily siezing on "localhost" as the
> problem.  This is in response to:
> 504 <dave at localhost>: Sender address rejected: need fully-qualified address

Forgot to enclose the headers, but I fixed the problem by changing the
first two lines of my /etc/hosts as follows:

- localhost pereiro
- pereiro.peloton pereiro
+ localhost
+ pereiro

Not sure if what I did is exactly right, but it seemed to work.

Dave Abrahams
Boost Consulting

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