jwpegram

This plugin protects your WPMU signup process against spambots with a simple math question. This plugin is based on the <a href="https://wordpress.org/extend/plugins/block-spam-by-math/" rel="ugc">Block-Spam-By-Math</a> plugin created by <a href="http://www.grauonline.de" rel="nofollow ugc">Alexander Grau</a>. This only protects the new blog creation process and the new user creation process. If you wish to have individual blog protection use the regular Block-Spam-By-Math plugin on individual blogs.
<h3>Help</h3>
For additional help check the plugin page at: http://www.jamespegram.com/wpmu-block-spam-by-math/

WPMU Block Spam By Math

This plugin protects your WPMU signup process against spambots with a simple math question.

Chris Taylor

Personal welcome is a WordPress/MultiSite/BuddyPress plugin that lists newly registered users, and allows site administrators to send them a personalised welcome message. The welcome messages are based on templates which you can write yourself (as many templates as you like). Once a message is sent that user won’t appear again.
There are four extra management features:
<ul>
<li>The ability to set all users as having been sent a welcome message (an easy way to bulk remove everyone from the list, for example when the plugin is first installed)</li>
<li>The ability to search for a user and send them a welcome message</li>
<li>The ability to set the new user as being spam</li>
<li>The ability to set the new user and all their blogs as spam</li>
</ul>
Of course, the templates don’t have to be just for welcoming people – they could contain FAQs, help information or anything else.
The plugin also makes use of the __() function to allow for easy translation.

Personal Welcome

Personal Welcome is a Wordpress plugin that allows site administrators to create and send personalised welcome messages to new users.

WPMU Block Spam By Math vs Personal Welcome