I have my own domain and use email forwarding. I use Windows Live mail as a client. So email is sent to firstname.lastname@example.org but is actually hosted at fastmail.fm.
So Live Mail is set up with email@example.com but of course logs in to Fastmail with its password.
When Live Mail sends an email it is merely sent from Firstname Lastname with no address showing.
Fastforward now to my new Gmail account. It is set up the same way with firstname.lastname@example.org as the email and reply-to address, but of course with a login to Gmail.
When I send an email from Live Mail using Gmail, the email is sent from Firstname Lastname (email@example.com). In other words it shows my real (cloaked) Email address.
I have a number of accounts an Live Mail only does this for Gmail.
I want my Gmail address hidden, but I cannot find out why Live Mail does this or how to prevent it. I have set Gmail to show firstname.lastname@example.org as the sender but this is not the issue as it is Live Mail that does it. It even shows this way in my sent folder.