| SMTP | Simple Message Transfer Protocol | 简单邮件传输协议 |
| SMTP | supplemental medium term policy | 辅助中期保险 |
| SMTP | Simple Mail Transfer Protocol | 简易电子传输协议 |
| SMTP | Simple Mail Transfer Protocol (internet email) | 简单邮件传输协议（互联网电子邮件） |
| SMTP | Strategic Medium Term Plan | 战略中期计划 |
| SMTP | Source-Model Technique Package | 源模型技术包 |
| SMTP | Small Mail Transfer Protocol | 小型邮件传输协议 |
| SMTP | Speculative Multithreaded Processor | 推测性多线程处理器 |
| SMTP | Shift Manager Training Program | 值班经理培训计划 |