What to allow as an ISP?

We have officially switched over this morning all our
domains to Maia,
but have not released to the users yet for another month or
so of
testing. During that time, we are reviewing all the possible
settings
and which to allow users to use. The one thing that is
system wide it
seems, is the learning in spamassasin, this is not done by
user or
domain, correct? Either it is on or off and any one user
learning
messages affects all users in the system, correct? This as
been our
experience with amavisd-new, but only admins here are doing
any
learning.

If so, then I'm looking for opinion, hopefully from some
other ISP's
that deal with lots of different domains and users. Have
allowing users
to train things been a problem? If you have a Viagra users
that keeps
learning to receive, this would in turn allow all users to
receive
Viagra messages, yes?

Also, has it been an issue for anyone to allow
administrators to read
mail?

Thanks in advance for any insight!

-- 
Robert

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On Sep 1, 2007, at 1:21 PM, Robert Fitzpatrick wrote:

> We have officially switched over this morning all our
domains to Maia,
> but have not released to the users yet for another
month or so of
> testing. During that time, we are reviewing all the
possible settings
> and which to allow users to use. The one thing that is
system wide it
> seems, is the learning in spamassasin, this is not done
by user or
> domain, correct? Either it is on or off and any one
user learning
> messages affects all users in the system, correct? This
as been our
> experience with amavisd-new, but only admins here are
doing any
> learning.

Yes it affects everyone, in the sense that it it scans and
scores the  
same, but of course, everyone can set their own thresholds
for which  
things are marked.


> to train things been a problem? If you have a Viagra
users that keeps
> learning to receive, this would in turn allow all users
to receive
> Viagra messages, yes?

It may weaken it, but all the other people submitting it as
spam will  
drown out the one.  In practice, everything averages out
pretty  
well.  The only down side comes if you have the AWL turned
on, and  
your config gets a little out of whack, say outdated, or
wrong  
trusted networks. In that case, it sometime starts learning
things  
the wrong way and snowballs out of control.  THis has been
documented  
on the mailing list several times, and keeping your
spamassassin  
rules up to date and correctly configured keeps that from
becoming a  
problem.

> Also, has it been an issue for anyone to allow
administrators to read
> mail?
>

In all my setups, the administrators can read the email
anyway, in  
the mail storage system; so it's  not an issue.  YMMV


David Morton
Maia Mailguard http://www.maiamailguard
.com
mortondadgrmm.net



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