Send Mail Features

Send Mail on Behalf of

If you want to send emails on behalf of another email account you need to first configure it from Send mail as with in the Accounts tab of your Gmail settings. This is ideal if you want to send emails on-behalf of your boss or an other user within your organization.

You can also send email to non-Gmail accounts such as those by Microsoft, Yahoo!, SendGrid or any other email server which supports SMTP. Just follow these steps:

Go to your Gmail Accounts settings
With in the section Send mail as click the "Add another email address" link
Follow the instructions to add your new account

Once the new account is added. Refresh the add-on and under 'Show Email Settings' you should find the option to choose from which email account you want to send the emails from.

SendGrid

SMTP Settings

Gmail

SMTP Settings

NOTE: Need to enable Less Secure Apps to work

SMTP Settings for Outlook.com and Microsoft 365

https://support.microsoft.com/en-us/office/server-settings-you-ll-need-from-your-email-provider-c82de912-adcc-4787-8283-45a1161f3cc3#bkmk_olko365b

Send emails over SMTP

Available only from the Google Docs addon

The Send mail as feature described above, will not allow you to send emails over smtp for your own account or other accounts with in your G Suite domain. Therefore if you want to use a 3rd party email provider such as SendGrid to send emails over SMTP with your gmail account you need to set the provider's smtp settings from Google Docs->Add-ons->Mail Merge->SMTP Settings.