How do I install or update the MageMail module?
Using ZIP File
You can always download the latest version of MageMail here: https://magemail.co/app/media/uploads/MageMail.zip
In order to update the module just copy those files into your Magento directory and clear your cache!
Here's a great step-by-step guide to help you get the module installed: https://magemail.co/blog/start/