Chrome: Dealing with a large amount of email will always be a drag. When you've got a bunch of messages you need to loop someone in on, it can be tedious to forward them all. Multi Forward for Gmail helps make this process simpler.
Gmail currently only allows you to forward one message at a time. Whether that's to help curb spam or simply because it's not an everyday task is unclear. However, there are times being able to forward multiple emails at once can be handy. For example, when you need to forward all of your employees TPS reports to your boss at the end of the month. Multi Forward for Gmail allows you to select multiple emails from your inbox, click the multi forward button and send them all out to any number of recipients at once.
Multi Forward for Gmail [Chrome Web Store]