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External Email Address Limitation for Mass Email in Salesforce
Below is the maximum number of external email addresses you can include in each mass email depends on your salesforce edition:
| Edition | External Address Limit per Mass Email |
| Personal, Contact Manager, and Group Editions | Mass email not available |
| Professional Edition | 250 |
| Enterprise Edition | 500 |
| Unlimited Edition | 1,000 |
| Developer Edition | 10 |
