Applescript to forward email but preserve sender How can I make an Applescript that Mail.app on my Mac can run? When it encounters a message that is being sent to mac@email.com, I'd like it to redirect it to email@gmail.com, where the "From" field is NOT mac@email.com, but rather is the "From" field on the original email that was sent to mac@email.com.

E.g., I'm Joe Schmo and I send an email from joeschmo@joe.com to mac@email.com. Then the Apple Script runs and redirects that email to send it to email@gmail.com with the From tag as joeschmo@joe.com

I am planning on setting up a rule in my Mail app that runs this apple script when it encounters a message that is being sent to mac@email.com.

Note: the emails in this example are fake.
You should be able to use the "Redirect" option, under the Message menu. Actually, if I'm reading your question right, you should be able to do this entirely through a rule, with no Applescript needed. 

Building from "How to batch forward messages from Mail.app", if you make a rule that targets emails sent to mac@email.com, just say "Redirect Message" to "email@gmail.com".

Example: 

Make sense?