WordPress MU

Is there a free to use mail plugin which can send messages to unlimited number of MU system members (blog owners).

Perhaps these would help? Don't know if they set limits.

http://wpmudevorg.wordpress.com/project/Mass-Mailer

http://wpmudevorg.wordpress.com/project/Bug-fix-for-mu-massmailer

Thanks dgilmour. I'll probably use Premium Mass Email Sender Plugin but it is limited to 2500 recipients. I doubt that one you mentioned is better. Thanks anyway.

I'll probably use Premium Mass Email Sender Plugin but it is limited to 2500 recipients.

You can actually use it for a bit more if you really need to. It just isn't as reliable after ~3K users. 2500 is just a 'safe' number that we advertise.

Thanks,
Andrew

Thanks Andrew. I'll definitely give it a try.

download link :( .?

What else is out there for more than 2500 users?

I have roughly 19,000 users..

Not meaning to sound like I'm selling anything... ahem... but you could try our WordPress MU MailChimp Plugin - or just plain old MailChimp if you are OK with exporting your users emails in one batch.