Bogdan Kushlyk

SX Easy-going SMTP is a free plugin for setting up sending emails for any WordPress web site.
Guide on how to use this plugin:
First of all install the plugin as described in “Installation”. 
After that new menu item “Settings -> SX Easy-going SMTP” will be added to admin settings menu.
For setting up third party mailing service like AWS SES, Google, Postmark or any other open the 
page Settings -> SX Easy-going SMTP and enter given credentials like host, port, username, password.

SX Easy-going SMTP

SX Easy-going SMTP is FREE plugin for sending e-mail from a wordpress web-site. Allows easily set up e-mail sending on any wordpress site in minutes.

Rafal Toborek

This plugin is currently in alpha stage. It includes only basic features like sending e-mail notifications using built-in PHP mail() function or by using external SMTP server (recommended). Work of this plugin depends mostly on the SMTP server configuration.
Lemme Know plugin allows you to send e-mail notifications only for a small amount of subscribers. There are plans to implement Cron-based solution which will allows to send notifications in chunks and omit server limitations.

Lemme Know

Sends e-mail notification for all subscribers when a new post is published.

SX Easy-going SMTP vs Lemme Know