On 9/28/06 1:11 AM, "Nigel Metheringham" <Nigel.Metheringham@dev.intechnology.co.uk> wrote:
On Wed, 2006-09-27 at 23:25 -0500, Brad Knowles wrote:
LMTP is probably the best and most native method for both sendmail and postfix. I can't speak for other MTAs.
Exim can do LMTP, over a pipe (ie fork/exec program), a socket or TCP/IP.
Exim can, indeed. But for some cases only if built with a special build flag. From the (4.6.1) spec:
The lmtp transport runs the LMTP protocol (RFC 2033) over a pipe to a specified command or by interacting with a Unix domain socket. This transport is something of a cross between the pipe and smtp transports. Exim also has support for using LMTP over TCP/IP; this is implemented as an option for the smtp transport. Because LMTP is expected to be of minority interest, the default build-time configure in src/EDITME has it commented out. You need to ensure that
TRANSPORT_LMTP=yes is present in your Local/Makefile in order to have the lmtp transport included in the Exim binary.
However, we seem to be interested in LMTP over TCP (to localhost), and I *think* that is available without the TRANSPORT_LMTP=yes build.
As one data point, the Exim (4.54) shipped with CentOS-4.4 is built without the TRANSPORT_LMTP flag: # exim -bV ... Transports: appendfile/maildir autoreply pipe smtp ...
A quick test with exim -bV -C testConfig suggests that the protocol = lmtp option in an smtp transport is at least not a syntax error (and I believe it will work).
--John