Office 365 has a limitation of being able to send to 10,000 recipients per day. A single email can be addressed to as many as 500 recipients. These limitations are set by Microsoft, thus IOT is unable to adjust these settings. IOT discourages sending bulk messages from a personal account and recommends using either GovDelivery or Listserv. IOT offers a free version of GovDelivery or a paid version, which allows for greater customization and personalization for the agency.