mobiledreamers@gmail.com wrote:

I love and use python a lot. And I m trying to make mailman, into a yahoo groups kind of interface,

In that I want to find out if any of you guys tried to do this and integrate it into another webservice?

I don't know the answer to this.

Does mailman uses coroutines to send email, because a coroutine based email gateway can support much more email messages perday than a thread based one

Mailman doesn't use coroutines per se, although I suppose you could think of Mailman's qrunner processes as generalized coroutines. Mailman also doesn't use threads.

Mailman's processing consists of a set of queues and qrunner processes. Each qrunner process is a single thread.

The basic flow, ignoring everything but posts for the moment, is the incoming MTA creates a pipe to a wrapper process which invokes the 'post' script to drop the message in the 'in' queue. IncomingRunner picks up the message from the 'in' queue processes it through a pipline of handler modules which check for holds, etc., build the recipient list and queue the message with recipient list in the 'out' queue. OutgoingRunner picks up the message from the 'out' queue and engages in an SMTP dialog with the outgoing MTA to send the message to the recipients. Depending on personalization and VERP options, there may be one SMTP transaction per recipient, or a few SMTP transactions with many recipients each. OutgoingRunner processes one message in its entirety before returning to the 'out' queue for the next message.

Parallelism can be increased by 'slicing' any queue into 2^n slices based on a message hash and running 2^n runners for that queue, each processing one slice.

-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan