[mshafshak]

I have more than 22k users i want to send a mass email to all of them, i just converted my website from joomla to wordpress and bbpress, so what can i do to send all users?
i tried
mass email http://wordpress.org/plugins/mass-mail/installation/
Sitewide newsletter http://wordpress.org/plugins/sitewide-newsletter/

but non worked

[Stephen Edgar]

You should look to a WordPress plugin for this, not specificly bbPress.

You should look at using a 3rd party email provider for this to ensure your emails sent to 22k user is not flagged as spam as there will be a high change it will if you do yourself unless you do it over the space of a few days in batches.

E.g. Start from here and find one that can do what you are looking for:
https://wordpress.org/plugins/search.php?q=mass+email