Re: [courier-users] AUTH_REQUIRED blocks inbound mail

permalink · #1 (**permalink**) 07-20-2007

--===============1486885774==
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content=3D"text/html;charset=3DUTF-8" http-equiv=3D"Content-Type"=
>
</head>
<body bgcolor=3D"#ffffff" text=3D"#000000">
Ok I understand. But then I think that I have done another mistake
'cause if I try to send a mail from a mailaddress (for example)
@gmail.com to another mail address (for example) @hotmail.com using my
smtp server on my domain without authentication, the delivery have
success. This is an open relay!!!! 
 
Perhaps i didn't set correctly my domain but surely there's something
else that i don't understand... 
 
Bye and thanx for the answers 
 
Daniele 
 
 
 
 
Jeff Jansen ha scritto:
<blockquote cite=3D"mid46A0E7AE.5020309@sil.org" type=3D"cite">
<pre wrap=3D"">-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Daniele Piaggesi wrote:
</pre>
<blockquote type=3D"cite">
<pre wrap=3D"">I have to configure a smtp with authentication on ldap=
=2E Then I
configured /etc/courier/esmtpd in this way:

AUTH_REQUIRED=3D"1"
ESMTPAUTH=3D"LOGIN"

When I send a mail from my domain to other email-address with this smtp
server (i tried with my thunderbird client) all's well: auth works fine.
But if I send a mail with other smtp server to an address of my domain I
have this error in /var/log/maillog

Jul 20 18:22:45 xxxxx courieresmtpd:
error,relay=3D::ffff:xx.xx.xx.xx,msg=3D"535 Authentication required.",cmd=
: DATA

and I don't know why.

If I set AUTH_REQUIRED=3D"0" in /etc/courier/esmtpd all works fine.
</pre>
</blockquote>
<pre wrap=3D"">
If you specify "Authentication Required", then no one can send mail to
your server unless they first authenticate. That's what you are seeing.
Courier rejects any mail unless the other side first authenticates.

You normally don't want this and so you should set AUTH_REQUIRED=3D"0".
Then courier will accept mail for users at your domain, which is
probably what you want.

By default, courier is very secure. It won't accept mail for unknown
users, and it won't allow you to relay through it unless you
authenticate first. You don't have to do anything if you just want to
allow your users to relay mail if they authenticate first. Courier does
that by default.

If you are trying to do something else, then tell us what you want to
accomplish and someone can probably tell you how to do it (assuming it's
possible).

HTH

Jeff Jansen
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (GNU/Linux)
Comment: Using GnuPG with Mozilla - <a class=3D"moz-txt-link-freetext" hr=
ef=3D"http://enigmail.mozdev.org">http://enigmail.mozdev.org</a>

iD8DBQFGoOeuGfIHDMaiC9cRAqR6AKCezmaMo9OmBNAGRIMr5j 4lD11A2ACguTo+
YDsSRa1ZNSrWf+I5LT38BqA=3D
=3DhE2q
-----END PGP SIGNATURE-----

-------------------------------------------------------------------------=

This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
<a class=3D"moz-txt-link-freetext" href=3D"http://clk.atdmt.com/MRT/go/vs=
e0120000070mrt/direct/01/">http://clk.atdmt.com/MRT/go/vse0120000070mrt/d=
irect/01/</a>
_______________________________________________
courier-users mailing list
<a class=3D"moz-txt-link-abbreviated" href=3D"mailto:courier-users@lists.=
sourceforge.net">courier-users@lists.sourceforge.net</a>
Unsubscribe: <a class=3D"moz-txt-link-freetext" href=3D"https://lists.sou=
rceforge.net/lists/listinfo/courier-users">https://lists.sourceforge.net/=
lists/listinfo/courier-users</a>

</pre>
</blockquote>
 
<div class=3D"moz-signature">-- 
Daniele
Piaggesi 
--------=
--------------- 
System
Administrator 
Pronetic=
s
s.p.a. 
Via E. L=
=2E
Cerva 127/C 
Tel.=C2=A0=
=C2=A0=C2=A0=C2=A0+39.06.51530849 
Mob.=C2=A0=
=C2=A0+39.328.6176226 
</div>
</body>
</html>

--===============1486885774==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2005.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
--===============1486885774==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

_______________________________________________
courier-users mailing list
courier-users@lists.sourceforge.net
Unsubscribe: https://lists.sourceforge.net/lists/.../courier-users

--===============1486885774==--

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode