Luis

Add simple but powerful email automation to your WordPress, and Add/Remove users from multiple Lists in multiple Email Service Providers (ESP).
With SniperPress Mail you can create rules to:
<ul>
<li>Add user to multiple lists from multiple ESP</li>
<li>Remove user from multiple lists and multiple ESP</li>
<li>Create and combine unlimited rules</li>
</ul>
Examples:
<ul>
<li>ADD a user to list A in MailChimp and REMOVE it from list B in GetResponse when the user subscribes on WordPress.</li>
<li>REMOVE a user to list A in MailChimp and list C in GetResponse when the user leaves a comment on WordPress.</li>
</ul>
Don’t be limited to one Email Service Provider. Use the best service for different lists. Get an ESP with less features and less expensive for your simple lists and move the buyers to higher end ESP’s to valuable lists.
Current ESP’s supported by SniperPress Mail:
<ul>
<li>MailChimp</li>
<li>GetResponse</li>
</ul>

SniperPress Mail

Add automation to your site by Adding and Removing from email lists in MailChimp and GetResponse on WordPress Hooks (On Register, On Comment).

Reza

This is the plugin for, getresponse-integration plugin user, 
who want their visitors signup by wp regular register form, 
automatically listed to getresponse contact list.
It work like getresponse-integration plugin “Subscribe via Comment”
The plug in require getresponse-integration plugin install to activate. 
https://wordpress.org/plugins/getresponse-integration/

GR on WP signup

This plugin is addon/child for getresponse-integration plugin. Important: This option is added to getresponse-integration plugin from ver-2.1

SniperPress Mail vs GR on WP signup