MUA(Mail User Agent)接收邮件所使用的邮件客户端,使用IMAP或POP3协议与服务器通信; MTA(Mail Transfer Agent) 通过SMTP协议发送、转发邮件; MDA(Mail Deliver Agent)将MTA接收到的邮件保存到磁盘或指定地方,通常会进行垃圾邮件及BD扫描; MRA(Mail Receive Agent)负责实现IMAP与POP3协议,与MUA进行交互; SMTP(Simple ...
1、发信服务器: 用来替用户把邮件发送到目的地的服务器,一般运行着Smtp服务器软件.(相关于邮局) 收信服务器: 等待用户来收信的服务器,一般运行着Pop/imap服务器软件.(相关于家门口的邮箱) 2、MTA(Mail Transfer Agent) 邮件传输代理,发送邮件服务器软件的总称,如:Sendmail ,Qmail ,Postfix,exim等 注意:一个...
邮件传输代理 (Mail Transfer Agent) 的缩写:任何用以传送电子信件的服务器MTBF 发生失误间的平均时间 (Mean Time Betwee…xiesx.bokee.com|基于152个网页 2. 邮件传送代理 ... SMTP 简单邮件传输协议 (Mail Transfer Agent) 邮件传送代理,将(Mail Delivery Agent) 邮件投递代理,用来投递邮件 …hi.baidu.com|...
近日,国家信息安全漏洞共享平台(CNVD)公布了Exim SMTP Mail Server缓冲区溢出漏洞。攻击者可利用该漏洞导致Exim SMTP Mail Server拒绝服务。该漏洞编号:CVE-2018-6789,安全级别为“高危”。 一、漏洞情况 Exim是一个MTA(Mail Transfer Agent,邮件传输代理)服务器软件,该软件基于GPL协议开发,是一款开源软件。该软件主要...
3)MDA(Mail Delivery Agent):MDA是挂在MUA下的一个小功能,它的主要功能是分析邮件的表头,决定邮件去向。 邮件传输过程采用的协议如下: 1)SMTP(Simple Mail Transfer Protocal) 邮件接收所需要的组件(MRA)和协议(POP3和IMAP) 邮件接收需要的组件为: 1)MRA(Mail Retrival Agrent):MUA向MRA发送请求接收邮件 ...
Several different software programs run on an SMTP server: Mail submission agent (MSA): The MSA receives emails from the email client. Mail transfer agent (MTA): The MTA transfers emails to the next server in the delivery chain. As described above, it may query the DNS to find the ...
2. SMTP relay SMTP servers transfer messages to other SMTP servers, this is called SMTP relay. You need SMTP relay if you are transmitting messages between servers that are hosted on different domains. In other words, if you are sending messages from Outlook to Gmail. But we still need a ...
Using a store and forward process, SMTP works with the mail transfer agent to move your email across networks to the right computer and email inbox. So when you send an email with SMTP host Gmail or AOL, the SMTP server processes your email, decides which server to send the message to...
The Simple Mail Transfer Protocol is an email exchange mechanism dedicated to email sending, submission, and relaying. We delved into the meaning of SMTP & SMTP servers, how it functions, what are the default ports and the recommended SMTP ports you can use. Armed with this knowledge, you ca...
MDA -- Mail Delivery Agent, 邮件投递代理,把邮件放到用户的邮箱里。 整个邮件传输过程如下: 目前使用的SMTP 协议是存储转发协议,意味着它允许邮件通过一系列的服务器发送到最终目的地。服务器在一个队列中存储到达的邮件,等待发送到下一个目的地。下一个目的地可以是本地用户,或者是另一个邮件服务器,如下图所示...