How to send email from the different address in Outlook?
By default, the active email account is the sender address while creating a new email in Outlook. But sometimes, you want to send email from different address, for example, in account A@A.com, use B@B.com as sender address to send email. How can you deal with this job?
Send email from different address by From
Reply emails always using default account
Send email from different address by From
Actually, in Outlook, you can choose other email address as sender address in "Message" box.
In the "Message" box, click at "From", a list with all email accountsβ addresses will be displayed, you can choose one as the sender address.
If there is no desired email address listed, you can click "Other E-mail Address" from the "From" drop down list, and type the email address you want in the "From" textbox in "Send From Other E-mail Address" dialog, click "OK" to change it as the sender address.
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Reply emails always using default account
If you want to always use the default account as sender while replying emails, you can enable the "Always reply with default account" option in "Kutools for Outlook".
1. Click "Kutools" > "Options" in "Options" group.

2. In the "Options" dialog, under "Reply" tab, check "Always reply with default account" option. Click "OK" to close the dialog.

From now on, whichever account you are in, the default account will be used as the sender while replying emails.
Always reply with default account
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