If you manage mailings with a diverse range of customers with various needs, Campaign Profiles could be a useful advanced feature for you. Campaign Profiles allow you to set different parameters for each mailing you send. A profile can set various parameters to override the account defaults. It can set values such as footer format and address, sending pool, and much more.
This feature needs to be enabled by customer service for Pro level accounts and is recommended for experienced mailers.
Once enabled, the option to select a campaign profile will appear on the mailing creation and edition screen.