In classic Outlook, if you have more than one email account set up, you can choose which to use for sending.
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When creating or replying to a message, select the From drop-down arrow and choose the email address you want to send from.
Note:Â If you don't see the From button, you might not have multiple accounts set up.Â
For more info, see Change the account used to send email messages.
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For New Outlook, in your draft message, on the Options tab, select Show From.
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Select the From drop-down arrow and choose the email address you want to send from.
Tip: This Show From option only applies to the current message you're writing. To turn on From systematically, in the main Outlook window, on the View tab, selectÂ