How do I specify a "reply to" address in gmail for android?
I don't see how to do it from the DX's gmail app. But, FWIW, you can do it from the web interface to your gmail account. Click settings, then the "accounts and imports" tab, then in the "send mail as" section, you can edit to set/change the reply to address.
Hope this helps.
How do I specify a "reply to" address in gmail for android?