esmtp

abbr.

enhanced simple mail transfer protocol 增强的简单邮件传送协议；enhanced simple message transfer protocol 增强的简单消息传递协议；

MIME/ESMTP Profile for
ESMTP and LMTP Transmission Types Registration
ESMTP Service Extension for Filtering Gateways
SMTP 服务扩展 ( ESMTP )
Bad ESMTP Verb Usage Equals Bad Times for Exchange
The Design and Implementation of ESMTP Based SOCKSv5 Proxy
ESMTP 전자메일서버에서 다국어 전자메일주소를 지원하는 UEMA 모델 제안
Capabilities Exchange and Immediate Delivery over ESMTP
SMTP и контроль связей ESMTP с примером конфигурации брандмауэра Cisco IOS
Cisco IOS ファイアウォールを使用して SMTP および ESMTP 接続を検査するための設定例