There are four different types of SWIFT messages:
1. MT Messages: These are messages that are used for interbank communication and are the most commonly used type of SWIFT message.
2. MX Messages: These messages are used for exchanging information between banks and other financial institutions.
3. MD Messages: These messages are used for managing the data exchanged between banks and other financial institutions.
4. MTN Messages: These messages are used for transmitting messages between banks and other financial institutions that are not part of the SWIFT network.