> ## Documentation Index
> Fetch the complete documentation index at: https://docs.emailbison.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

Sender Emails are the email accounts EmailBison will use to send emails from.

EmailBison provides unlimited storage for sender emails. If you are connecting a <Tooltip tip=">10k">large amount</Tooltip> of accounts, please contact the EmailBison support team to ensure that your private infrastructure is scaled up.

## Sender Email Types

EmailBison separates sender emails into three types:

1. Google Accounts
2. Microsoft Accounts
3. Custom SMTP Accounts

You can have all three types connected to a workspace, and even attached to the same campaign.

## Workspace Interactions

Sender Emails are the only record that can only exist in one workspace at a time. You can not connect the same sender email to multiple workspaces.