In Gmail on a computer, expand the address line in the reply, then open From and select your verified alias. If the recipient’s answer goes to the wrong inbox, check the alias’s Reply-To setting under Send mail as.
01Pick a sender for the current reply
Section linkOpen the reply and click the space next to the recipient if From is hidden. Choose the address you want. If it is absent, open Settings → See all settings → Accounts and Import or Accounts. In Send mail as, add and verify an eligible address you own. For a missing work alias, check with your Workspace administrator.
02Choose the default for future messages
Section linkUnder Send mail as, use Make default if you generally want to send from the alias. If Gmail offers a choice under When replying to a message, select the option to reply from the address the message was sent to when that is what you want. Check From before replying to a forwarded or group message.
03Choose where the recipient’s reply goes
Section linkIn Send mail as, click Edit info for the address you send from. Choose Specify a different reply-to address, enter the inbox you want, and save. Send a test message to another inbox you control. Confirm the sender on arrival, then reply and check where the answer lands.
04Check who hosts the alias
Section linkGoogle says Gmail-to-Gmail and Google Workspace aliases remain supported. Gmail plans to remove Send as for third-party addresses in January 2027. If Gmail restricts setup for an external address, send from that provider’s own mailbox.