CTT - Correios De Portugal, S.A., together with its subsidiaries, engages in reference postal business in Portugal and internationally. The company operates through three segments: E-Commerce Solutions, Mail and Services, and Banco CTT. It is involved in consulting, outsource process management, and contact center operations; courier services, urgent mail transport, express mail, and delivery of goods; distribution of advertising mail; payment services; and provision of various banking products and services. The company was founded in 1520 and is headquartered in Lisbon, Portugal.