You may need to find all accounts in your database that have an email address, whether that is for a general mailing that you want to send to everyone or just to see how many accounts you have email information for. This can be done by creating a query.
1. Click Queries in the menu bar 2. Click Manage Queries 3. Select a category that you want to store this query in (Example: Base) 4. Click New Query under Tasks 5. Name the query Accounts with an Email Address 6. For Starting Query choose Category: Base and Query: All Constituents 7. For Data Return Type choose Accounts 8. Under Criteria Options select "Match all criteria" 9. Under Browse Fields select Account from the drop down menu 10. Click Email Address 11. Check Field Has Any Value 12. Click Save and Preview
This query will contain all accounts that have an email address on any of their active personas.