What is the PROXYAUTH IMAP extension?

Question

What is the PROXYAUTH
IMAP extension?
<P>
PROXYAUTH is an
undocumented IMAP extension supported by Messaging Server 3.x for use by
migration tools. It allows a "superuser" (administrator) client to log in on
behalf of a user.
<P>
In Messaging server 2.0, it was possible to use telnet
to access the IMAP4 port and then
enter the following command:<BR>
<P>
LOGIN Postmaster: user PostmasterPassword
<P>
However, in Messaging Server 3.x, the same method does not work. Instead, a
3.0 server supports the X-NETSCAPE capability. To use this capability, you
must define a user ID on the server that is capable of proxy authentication.
<P>
For <B>Unix</B> servers, add the chosen account name to the
/etc/netscape.mail.conf
file. For example,<BR>
<P>
ProxyAuthUser=headhoncho
<P>
For <B>Windows NT</B> systems, use the following steps to set up
ProxyAuthUser:<BR>
<P>
<OL>
<LI>Start regedt32.exe.
<P>
<LI>Select HKEY_LOCAL_MACHINE\Software\Netscape
<P>
<LI>Select Messaging Server\3.0\Dispatch\Config
<P>
<LI>Create a new value called ProxyAuthUser
of type REG_MULTI_SZ
<P>
<LI>Double-click the newly created value.
<P>
<LI>Enter the username you chose for the ProxyAuthUser
<P>
<LI>Close regedt32.exe.
</OL>
<P>
To use the PROXYAUTH
feature, do the following actions:<BR>
<P>
<OL>
<LI>In IMAP, authenticate using the ProxyAuthUser
account. For example,<BR>
<P>
LOGIN headhoncho <I>password</I>
<P>
<LI>Use the PROXYAUTH
extension.<BR>
<P>
PROXYAUTH <I>normaluser</I>
</OL>
<P>
If this command succeeds, the session will run as the account <I>normaluser</I>.
<P>
In addition, PROXYAUTH
has an optional parameter that specifies the path location of the user's
maildrop. This is useful if the user is not in the directory yet.
<B>Caution:</B><BR>
<P>
PROXYAUTH does not
require that the user ID or maildrop entered already exists, so be careful
when entering these values. To avoid possible complications, add to the
directory first and do not rely on the non-existence feature.

Answer 1

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-DH