Ismail

bbPress Contacts allows you to add contact and bookmarking customizable buttons (add contact/remove contact) to bbPress profiles, and in the forums below topics and replies author details.
These buttons will permit logged in members to add this user as contact or remove them as contact.
A contacts section is added to the bbPress profile of current user, allowing them to:
<ul>
<li>View bookmarked users and contacts</li>
<li>Search these users</li>
<li>Quick removing a contact with a small cross button</li>
<li>Paginating through these results.</li>
</ul>
Also, AJAX can be enabled (enabled by default) to process buttons faster, and process the search, pagination and list the available contacts in the bbPress profile page.
You can set it up the way you want, bbPress Contacts is translation-ready and easy to customize, so you can possibly rename “Add Contact” to “Bookmark” or “Add as Friend”, etc.
I will write a blog post about using and customizing this plugin. Be sure to check https://blog.samelh.com
This project is also available on Github, fork it from there, or open new issues for bug reporting, or feature suggestion, or imporvement.
<ul>
<li>
See my other <a href="https://codecanyon.net/collections/5612972-bbpress-plugins" rel="nofollow ugc">bbPress premium plugins</a>
</li>
<li>
<a href="https://samelh.com/work-with-me/" rel="nofollow ugc">Hire me</a> for a custom bbPress plugin
</li>
</ul>
More docs coming soon.

bbPress Contacts

Works well for adding bookmarks feature to your bbPress forums. 

Works Well

Allow your bbPress users to bookmark other users easily and view/search them through their bbP profiles.

minutemailer

Minutemailer is an online email marketing tool for businesses. Create, schedule and send e-mail messages and newsletters for free. Edit by drag & drop. Choose from ready-made mobile friendly templates for newsletters, regular emails, press releases, offers and invitations. Easily customize the design. Simple, functional and affordable email marketing for you and your business.
To use the Minutemailer plugin please signup for a <a href="https://minutemailer.com" title="Great newsletters fast" rel="nofollow ugc">free Minutemailer account</a>.

Minutemailer Subscribe

Get more email contacts by adding a subscribe widget to your Wordpress blog. You need a free account on Minutemailer.com to use the plugin.

bbPress Contacts vs Minutemailer Subscribe