scribu

Scenario
You’re the only user who can create posts and moderate comments on your WordPress installation.
You have both ‘Email me when anyone posts a comment’ and ‘Email me when a comment is held for moderation’ options checked.
You get an email about a comment awaiting moderation and you approve it.
The problem is that right after that you get a second email letting you know that a new comment has been posted, which of course you already knew about.
Solution
Instead of disabling email notifications for new comments alltogether, you can use this plugin and not receive the redundant emails mentioned above.
Links: <a href="http://scribu.net/wordpress/filter-email-notifications" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Filter Email Notifications

Stop WordPress from sending email notifications for comments that have been manually approved.

Grant Bivens

Notification Review for Gravity Forms adds a “Notifications Review” submenu item under Forms to display a table of all form notifications, including Send To, From Name, From Email, Reply To, BCC, and Subject, with filtering by form status and search by email or subject. This can be a very helpful plugin when you have a lot of forms with notifications going to many different people. One use case might be checking to see what notifications are being sent to an individual that is no longer in their position.

Notification Review for Gravity Forms

Adds a "Notification Review" submenu item under Forms to display a table of all Gravity Forms notifications on your website.

Filter Email Notifications vs Notification Review for Gravity Forms