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).

shabbirbhimani

Footer Slideup Form is one of the best ways to ask your user to subscribe to your list without any interruption or blocking and this plugin does exactly that. It adds GetResponse subscribe form in the footer of your WordPress blog. <a HREF="http://imtips.co/go/gr" rel="nofollow ugc">GetResponse</a> (Aff Link) is an autoresponder which allows you to send series of email message to subscribers.
This plugin is only for GetResponse form and for AWeber please use <a href="https://wordpress.org/extend/plugins/aweber-footer-slideup/" rel="ugc">AWeber Footer SlideUp form</a> plugin.

GetResponse Footer SlideUp

Footer Slideup Form adds an GetResponse Opt-In form into the footer where user's can subscribe to your List.

SniperPress Mail vs GetResponse Footer SlideUp