Hello @td8000,
Question 1: To address your first question about placing the ‘real’ sender in the email, I’m not sure what you mean. You can set the ‘From’ address to be any email address. Note that the “sender” is your server (or SMTP sending service if you use one), so you really must provide a ‘From’ address. Can you clarify what you’re trying to achieve here?
Question 2: Dynamically changing the subject line like this would require new placeholders not available in core WooCommerce, so would take custom code or a plugin. One such plugin that might do some of what you want is AutomateWoo by disabling the ‘core’ emails and replacing them with your own dynamic versions. However, lists of products typically include newlines which might cause an issue in the message subject field – so you would possible still need custom PHP to make it work.
Question 3: This support forum is appropriate for your core WooCommerce questions only – please contact WooCommerce.com support or the support for the plugin authors for help with your premium plugins.
To edit the general content of your emails, plugins like Mailpoet lets you customize Woo emails. There is also the core way to override the content of the emails by using PHP template overrides, you can read more about that here: https://woocommerce.com/document/template-structure/
If you’d like a hand, I suggest you check out the Community Slack or Facebook Group for community help with developer-level questions.
We look forward to hearing back from you, and if you have any further questions or details please include those in your reply. Thanks!