On Apr 24, 2004, at 07:59, Andrzej Filip wrote:
> Is it possible to make exim verify recipient addresses delivered via
> lmtp (socket) transport ? [LMTP callout]
>
> I would like to make exim verify addresses delivered to Cyrus IMAP when
> accepting "RCPT TO:" command.
It is possible. You need to:
- use an SMTP transport ("smtp" driver), and set "protocol = lmtp"
- setup client authentication in Exim, authenticate as "cyrus" user
- use "verify = recipient/callout,defer_ok" in the appropriate ACL
However, I found it easier to deliver to a separate transport using the
"lmtp" driver (i.e. a local socket delivery), and then set up a
condition in the router as follows:
cyrus_lmtp_router:
debug_print = "R: cyrus_lmtp for $local_part@$domain"
driver = accept
domains = +local_domains
local_parts = !root
require_files = /var/spool/cyrus/mail/user/${lc::$local_part}
transport = cyrus_lmtp_transport
Two notes:
- The user running Exim needs to have read/execute access in
the directory /var/spool/cyrus/mail/user (in this example).
On my Debian box, I do that by "adduser Debian-exim mail",
ensuring that the directory belongs to the group "mail" and
has "r" and "x" bits.
- I presume that Cyrus is configured with "lmtp_downcase_rcpt: yes",
and "hashimapspool: no". If you DO hash the IMAP spool, as shipped,
then change the condition above to:
require_files =
/var/spool/cyrus/mail/${lc::${substr_0_1::$local_part}}/user/
${lc::$local_part}
It is a bit hackish. If you prefer, you ought to be able to use the
"mbpath" command provided with Cyrus, in a manner similar to:
condition = ${run {/usr/sbin/mbpath -q -s
user.${lc::$local_part}}{1}{0}}
This introduces a process overhead for each local delivery. Also
ensure that the Exim user indeed can run 'mbpath'.
-tor
