When sending mail from a different account (say email@example.com) than my default in Gmail (say firstname.lastname@example.org), when someone reply to me I can see that my email@example.com is mentioned in the conversation along with firstname.lastname@example.org.
From: email@example.com on behalf of firstname.lastname@example.org
Also, I tried to send myself mail to email@example.com from firstname.lastname@example.org (through alpha account) and when clicking the
show original in the message I can see my email@example.com there.
When I send mails from firstname.lastname@example.org I don't want the recipient to know about email@example.com. Is there any way to prevent that from happening other than logging out from alpha and logging in to beta?