| Subject | English | Portuguese |
| comp., MS | Simple Mail Transfer Protocol A member of the TCP/IP suite of protocols that governs the exchange of electronic mail between message transfer agents | protocolo SMTP (Simple Mail Transfer Protocol) |
| commun. | simple mail transfer protocol | protocolo de transferência de correio eletrónico |
| comp., MS, Braz. | Simple Mail Transfer Protocol | protocolo SMTP (A member of the TCP/IP suite of protocols that governs the exchange of electronic mail between message transfer agents) |