[CLUE-Admin] Re: CLUE-Tech post from admin@clue.denver.co.us requires approval

[Dave Hahn]

Perhaps a bit of clarification is in order:

If we have e-mail aliases that point, for instance,
lynn.danielson at clue... To lynnd at lynnshouse.com the clue related mail
server would automatically forward to lynnd at lynnshouse.com.  In this
case, Lynn should be allowed to relay via his ISPs smtp server and not
need to utilize the CLUE smtp server for outgoing mail.  The appropriate
addressing is reliant on Lynn's e-mail software to craft the headers
correctly.  Most e-mail software that allows multiple e-mail addresses
allows the user to select the sending account/personality from which to
address the e-mail.  So, in this case, no sending access to the CLUE
smtp server is required.  However, this does give, in the e-mail
headers, the hint that the mail did not originate from the CLUE server,
but was relayed through another SMTP server.  Although this is an item
of note, it is not, typically, a big deal.  However, in order to allow
outside users to relay via the CLUE smtp server (i.e. to correct the
"headers problem", the sender needs to (1) originate from a known IP
address or (2) authenticate to the server first.  A third option, albeit
more inconvenient, would be to allow sending from a web based solution
only.  

Overall, we need to decide how we expect the e-mail aliases to be used.
I expect, the relaying via the users' ISP is the easiest.

-d

-----Original Message-----
From: clue-admin-admin at clue.denver.co.us
[mailto:clue-admin-admin at clue.denver.co.us] On Behalf Of Lynn Danielson
Sent: Tuesday, August 05, 2003 8:45 AM
To: clue-admin at clue.denver.co.us
Subject: Re: [CLUE-Admin] Re: CLUE-Tech post from
admin at clue.denver.co.us requires approval

Jed S. Baer wrote:

>Lynn Danielson <lynnd at techangle.com> wrote:
>  
>
>>... we're what is referred to as an open relay.
>>Which leaves us open to some horrible abuses.
>>    
>>
>
>I'd say we should close that puppy up PDQ, unless there's a compelling
>reason to leave it open. Is there anyone who has a legitimate reason to
>use the CLUE server for relaying their mail?
>

We've agreed to offer email aliases as a benefit to everyone who signs
up
as a dues paying CLUE member.  I'm planning to make a big deal about
that at next weeks meeting.  I've enjoyed having a
lynn.danielson at clue...
address and I think others will too.  Something to extend our local 
sense of
community.  So, I don't want to give that up.  Dave has suggested a
solution
with SMTP after POP.  Which would make using the alias a bit more of a
pain, but it's probably worthwhile as long as it doesn't have any other
bad
side effects.

>We sure don't want to have to deal with any of the problems which
result
>from being listed on ORBS (or whatever its successor is), or any of the
>other blacklists. Or have to deal with abuse complaints resulting from
>having an open relay.
>

As far as I know this hasn't been a problem.  I think Jeff is set up to
receive root traffic on the box and he hasn't mentioned anyone
contacting him about this.  How does one check the ORBS list or
other blacklists?

Lynn

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