| Subject | English | Spanish |
| IT | Message Transfer Agent | agente de transferencia de mensajes |
| commun., IT | message transfer agent | agente de transferencia de mensajes |
| comp., MS | message transfer agent | Agente de transferencia de mensajes (An application process, as described in the X.400 message-handling system, responsible for delivering e-mail messages. After receiving a message, an MTA stores it temporarily and either delivers it or forwards it to another MTA. During this process, the MTA can change the message headers) |
| commun., IT | message transfer agent entity | entidad de agente de transferencia de mensajes |