caugb

<p>Create groups to organize your subscribed users and send them e-mails based on their groups or by user levels, capabilities or usernames. You can also send messages for anybody, directly by e-mail addresses. Besides that, you can use some information of the current user and of a selected publication (post or page), to personalize the message, that can take attached files, if you want.<br />WPMailing offers support if you are using Xinha4WP or Dean’s FCKEditor, to write e-mails in your favorite editor.</p>
<h3>Features</h3>
<p>Once the plugin is activated, your administration panels will offer:</p>
<ul>
<li>The ability to create groups and tag your users, by adding new features in Users section pages<br />
through Javascript (user.php, profile.php and user-edit.php).<br />
** This actions will <strong>not modify the WP original files</strong>.</li>
<li>An interface to modify names and descriptions of your groups (Manage > Groups)  </li>
<li>An interface to compose and send e-mails to subscribed users,<br />
with some interesting features (Write > Write e-mail):<br />
** The ‘To’ field supports multiple e-mails and inclusions by user level, capability, group or username.<br />
** You can attach multiple files to the message<br />
** You can use values of an specific post or page<br />
** The e-mail can be personalized with informations of the user that will receive the message</li>
<li>An interface to set or update some WPMailing configurations (Options > Mailing)  </li>
<li>Complete information about the sending process after you send any e-mail</li>
</ul>
<h3>Feedback</h3>
<p>Your feedback are welcome.<br />
  Send any bug detections, suggestions, critics, etc. to: wpmailing(at)jsbrasil(dot)com<br />
  Thank you, Cau Guanabara.</p>


WPMailing

Create groups to organize your subscribed users and send them e-mails based on their groups or by user levels, capabilities or usernames.

Zack Katz

<h3>Group Your Users</h3>
<ul>
<li>Add descriptions to user groups</li>
<li>Assign colors to user groups</li>
<li>View all users in a group</li>
<li>Add users to more than one group at a time</li>
</ul>
<p>The User Groups plugin does not modify user capabilities, limit access, or anything like that. This plugin does one thing, and does it well: create groups and organize your users by that group.</p>
<p>Works beautifully with the <a href="https://wordpress.org/extend/plugins/rich-text-tags/" rel="ugc">Rich Text Tags</a> plugin for adding WYSIWYG descriptions to the User Groups.</p>


WPMailing vs User Groups