Home WeChat Applet Mini Program Development Detailed introduction to java email development applet

Detailed introduction to java email development applet

Apr 15, 2017 am 11:17 AM

First use the DOS window to run the command to send an email:

Start - Run - CMD:

telnet stmp.163.com//此为发送邮件的服务器协议
Copy after login

The server returns a 220 message indicating success.

Then enter:

ehlo *****//ehlo为smtp二代协议,为区别一代的helo,将e和l换个位置。  *为任意内容
Copy after login

The server returns 250 information to indicate success, then select the login method:

auth login plain
Copy after login

Type

auth login
Copy after login

and returns 334 to indicate successful login. Then enter the username and password to log in and end with the Enter key.

//这里的账号和密码必须经过base64加密。若是pop3服务器不用加密。
Copy after login

The server returns 235, and the OK message indicates that the login is successful.

Then enter:

mail from : <***@xxx.com>//一定不能出错,也要按顺序输入,否则不成功。也不能修改,输入错字符后回车重新输入。
Copy after login

The server returns 250 for success and 550 for failure.

rcpt to:<***@xxx.com>//同上
Copy after login

The server returns 250 for success and 550 for failure.

data//准备写正文。
Copy after login

Return 354 information to indicate success.

from:<xxxx@xxx.com>//这里的from显示的是查看邮件时发件人信息。可以随便输入。
subject:***** //邮件主题
               //一定要空一格。
test           //这里是内容
.              //以点结束。
Copy after login

If the server returns 250 information, it means the sending is successful. The function of sending emails using DOS is realized.

Here, when we send emails, we need to confirm the identity through username and password, but do different email servers need to be confirmed? the answer is negative.

So, how can we pretend to be a server and send emails directly to an email server?

First we need to obtain the IP address of the machine to impersonate a server:

ipconfig /all//拿到IP
Copy after login

Resolve the DNS of a certain mailbox server and get the address of the smtp server.

nslookup
set type=mx//邮箱类型
域名
Copy after login

Find out the SMTP server address and copy it, such as 163mx02.mxmail.netease.com of 163.

Then connect to the server:

telnet 163mx02.mxmail.netease.com 25  
ehlo IP//这里填写的是本机IP
Copy after login

OK, the rest is the same as before. In this way, this machine is used as a server to send emails (to determine whether it is a server, you need to reversely parse the dns to see if it is the same as the IP).

The above is the detailed content of Detailed introduction to java email development applet. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1653
14
PHP Tutorial
1251
29
C# Tutorial
1224
24
Break or return from Java 8 stream forEach? Break or return from Java 8 stream forEach? Feb 07, 2025 pm 12:09 PM

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is

PHP: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP vs. Python: Understanding the Differences PHP vs. Python: Understanding the Differences Apr 11, 2025 am 12:15 AM

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP vs. Other Languages: A Comparison PHP vs. Other Languages: A Comparison Apr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP vs. Python: Core Features and Functionality PHP vs. Python: Core Features and Functionality Apr 13, 2025 am 12:16 AM

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

Java Program to Find the Volume of Capsule Java Program to Find the Volume of Capsule Feb 07, 2025 am 11:37 AM

Capsules are three-dimensional geometric figures, composed of a cylinder and a hemisphere at both ends. The volume of the capsule can be calculated by adding the volume of the cylinder and the volume of the hemisphere at both ends. This tutorial will discuss how to calculate the volume of a given capsule in Java using different methods. Capsule volume formula The formula for capsule volume is as follows: Capsule volume = Cylindrical volume Volume Two hemisphere volume in, r: The radius of the hemisphere. h: The height of the cylinder (excluding the hemisphere). Example 1 enter Radius = 5 units Height = 10 units Output Volume = 1570.8 cubic units explain Calculate volume using formula: Volume = π × r2 × h (4

PHP: The Foundation of Many Websites PHP: The Foundation of Many Websites Apr 13, 2025 am 12:07 AM

The reasons why PHP is the preferred technology stack for many websites include its ease of use, strong community support, and widespread use. 1) Easy to learn and use, suitable for beginners. 2) Have a huge developer community and rich resources. 3) Widely used in WordPress, Drupal and other platforms. 4) Integrate tightly with web servers to simplify development deployment.

PHP's Impact: Web Development and Beyond PHP's Impact: Web Development and Beyond Apr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

See all articles