How do I upload file to a specific email?

How to upload file to a specific email using app inventor to develop android and ios app¿

Some of Taifun's suggestions might work on both Android and iOS. Be aware, ActivityStarter 'solutions' currently are not available on ios so far as are email solutions using extensions.

Is it a gmail account ? Do you want to send it from this specific email or to this specific email ?

Yes it gmail account

send to that gmail account or send from that gmail account ?