On Tue, 21 Aug 2007, Juergen Edner wrote:
> >> Now I wonder if it is possible to force usage of a specific
> >> authenticator, e.g. CRAM-MD5, when connecting to a specific
> >> remote SMTP server and to stop transmitting a message if
> >> authentication fails (this can be done by using hosts_require_auth).
The forthcoming Exim 4.68 (which I hope to release early in September if
not before - meanwhile you can use the snapshot if you want) contains
this new feature:
3. Authenticators now have a client_condition option. When Exim is running as
a client, it skips an authenticator whose client_condition expansion yields
"0", "no", or "false". This can be used, for example, to skip plain text
authenticators when the connection is not encrypted by a setting such as:
client_condition = ${if !eq{$tls_cipher}{}}
Note that the 4.67 documentation states that $tls_cipher contains the
cipher used for incoming messages. In fact, during SMTP delivery, it
contains the cipher used for the delivery. The same is true for
$tls_peerdn.
--
Philip Hazel University of Cambridge Computing Service
Get the Exim 4 book: http://www.uit.co.uk/exim-book
