Can't add my workspace email address as a "send as ... - Google Help
Can't add my workspace email address as a "send as" address in my personal email
- Go to your Google Account.
- Select Security.
- Under "Signing in to Google," select 2-Step Verification.
- At the bottom of the page, select App passwords.
- Enter a name that helps you remember where you'll use the app password.
- Select Generate.
...
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I want to send emails via google's smtp server under an alias address from my own domain
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