Magento 2 Email Sender Incorrect

If you are using Magento 2.2.4 or higher, either fresh or upgrade from 2.2.3, there is a bug that alters the email sender name.  It will change from your preset in the store configuration General->Store Email Address to the server usernames. Something like this:

2.2.3 – sales@example.com

2.2.4 – serverusername@myserver.magemojo.com or on Stratus this might be www-data@…mojostratus.io

A github issue is tracking this https://github.com/magento/magento2/issues/14952 .  We tested and confirmed the bug and a fix is to disable all the Amazon modules:

Amazon_Core
Amazon_Login
Amazon_Payment

You can do this with the following commands:

php bin/magento module:disable Amazon_Login
php bin/magento module:disable Amazon_Payment
php bin/magento module:disable Amazon_Core

Then re-deploy production mode for your Magento 2 store.