SocialBook allows you to send bulk emails through your own gmail/google app/outlook email.  

  1. After you login, go to https://socialbook.io/mailaccount and click the button 'Connect a mail account'

2. A pop up will open asking you to choose which mail server you are using: Currently SocialBook supports Gmail/Google App or Microsoft Outlook email:

By default, Gmail is selected.

3. Click 'Connect', then you will be prompted to login use your gmail credentials:

4. After you login with your account/password, you can grant the permissions required by SocialBook to send emails on your behalf.

5. Once your gmail is connected, you can then select your account when sending emails to influencers. Note that there will be a dropdown allowing you to choose your email as the sender email.