Linear congruent generators and , in fact , all polynomial congruent generators turn out to be easy to break with relatively little information , and they should be avoided at all costs 某些电子邮件服务器中存在的一个大问题是它们在获取邮件端口之后没有放弃它们的root权限（ sendmail是个经典示例） 。
The production web server for microsoft operating systems is iis , which includes a web server , file transfer protocol server , simple mail transfer protocol smtp virtual e - mail server , and other facilities 用于microsoft操作系统的成品web服务器是iis ，它包括web服务器、文件传输协议( ftp )服务器、简单邮件传输协议( smtp )虚拟电子邮件服务器以及其他设备。
In this project , tool vistual c is used to program the edit & management software , it ’ s convenience to build 、 amend and download teds . two methods activex control and api communication function are to realize communication 软件开发包括了部分测控软件:电子数据表格的编辑下载软件、电子邮件服务器&数据库软件,同时给出具体实例来演示客户端的应用。
Mode , the provider attempts to flush all event information as soon as events are received , but the flush attempt will not succeed more frequently than every minute to avoid putting an undue load on the e - mail server 模式下，该提供程序尝试在接收事件时立即刷新所有事件信息，但是，为了避免使电子邮件服务器承担过重的负荷，只有频率不超过一分钟一次的刷新尝试才能成功。
Optional create entries for multiple domain name servers that can be used by the report scheduling and delivery processor if there is a denial of service attack on an external server such as an e - mail server that is the recipient of report delivery （可选）创建多个域名服务器条目，万一发生来自作为报表传递收件人的外部服务器（如电子邮件服务器）的拒绝服务攻击，报表计划和传递处理器就可以使用这些域名服务器。
Resource of single machine is not enough for the increasing number of users . and also it is lack of redundance , if one spot fault occurs , the whole email system will down . on the other hand , the traditional email system can not provide the same environment for shift users , if users use different machines for each time , the environment can not be restored for them 随着internet的不断发展，传统单机上实现的电子邮件系统越来越难以满足应用的增长需要，传统电子邮件服务器使用单台服务器提供smtp和pop3服务，因此服务器资源严重不足，无法满足用户数量的不断增加，而且缺乏冗余措施，服务器的单点故障会造成电子邮件系统的完全瘫痪，另一方面移动用户无法在不同的机器使用相同的电子邮件环境，以校园网电子邮件应用为例，学生用机不固定，因此每次都不能回复上一次的使用环境。
Next , this paper studies the pki technology , ssl protocol and smart card technology , and then put forward a security email solution , which solves some problems as follows : ( 1 ) protect email subject secret ( 2 ) realize email header safe transmission ( 3 ) security keys management then , this paper uses existing products ( wallgreat kmc ) to build a pki platform , and realize a model for this solution , which includes a secure email server and an email client 本文研究了pki技术、安全套接层ssl协议和智能卡技术,并在此基础上提出了一种安全邮件解决方案,旨在解决以下问题: ( 1 )邮件主题的保密性问题( 2 )邮件头的安全传输问题( 3 )密钥的安全管理问题接着,本文利用公司己有产品(华翔腾密钥管理中心)搭建pki平台,设计并实现了该解决方案的一个系统模型,该模型包括安全电子邮件服务器和客户端。
This paper analyzes the threat that e - mail server system faces and proposes effective solution to enhance its security . what ' s more , the paper discusses in detail on the relative security solution , such as the implementation of sasl authentication mechanism in the secure email server system 本论文针对电子邮件服务器端分析了电子邮件系统面临的安全威胁，给出了增强电子邮件系统安全性的措施，并详细讨论了一些相关的安全措施，如sasl验证机制等在电子邮件服务器系统中的实现。
The paper discussed the following four points : the security of java , the implemention of mvc pattern and the principle and implemention of the send and incept of e - mail based on java ; the principles and implemention of smtp , pop3 and imap , and the characteristic of the e - mail server sendmail , qmail and postfix ; the principles and implemention of symmetrical encryption and unsymmetrical encryption technology , and the advantages and disadvantages of them ; the characteristic of rubbish e - mail , and the principles and implemention of anti - rubbish e - mail technology 本文研究的主要内容包括: java技术安全性, java对mvc模式的实现,以及java技术解决电子邮件发送和接收问题的原理和实现方法;电子邮件相关协议smtp , pop3和imap的原理和实现方法,以及电子邮件服务器sendmail 、 qmail和postfix的特点;对称加密与非对称加密技术的原理和实现方法,以及两者的优点和缺点;典型垃圾邮件的特征,以及反垃圾邮件技术的原理和实现方法。
