[Mailman-Users] some users recive email but they can't send

[Steff Watkins]

> Remote host said: 554 <chile-datos at mail.degu.cl>: Relay access denied

Second thought on this (still not a Mailman problem, OK?)

Has the user concerned setup their mail client to correctly authenticate
with the mail server?

It could be that their mail client is using the correct transmission
path but when trying to negotiate with the mailserver it has not been
setup to properly authenticate them with that mailserver.

As such, the email would be from an "unauthorised user" and so would be
bounced back.

Again, this is mainly an anti-spam measure.

Regards,
S Watkins
---------------
Steff Watkins    Natural History Museum, Cromwell Road, London, SW7 5BD
Systems programmer   Email: s.watkins at nhm.ac.uk 
Systems Team    Phone: +44 (0)20 7942 6000 opt 2
========
Many were increasingly of the opinion that they'd all made a big mistake
in coming down from the trees in the first place. And some said that
even the trees had been a bad move, and that no one should ever have
left the oceans. - HHGTTG