有可能验证某邮箱是否存在吗？
由于之前没启用邮箱验证，所以用户信息中有很多无效邮箱，现在要把邮箱存在的用户标记出来。
邮箱格式是否正确好判断，邮箱域是否存在也能通过socket发个通信确认，可邮箱是否存在该怎么弄？
求解。
------解决方案--------------------
SMTP
我写过，过滤一百万个邮件地址，好多都是国外的
期间也存在许多问题，有些不稳定，第一次回的有第二次又返回的是不存在，我也郁闷
由于安全性原因，现在匿名好像不行了
实现大体过程就是这样的，得参照SMTP协议说明
见我当初写的一篇心得
http://blog.csdn.net/franzhong/article/details/6311654
Dependency Injection in PHP: Avoiding Common PitfallsMay 16, 2025 am 12:17 AMDependencyInjection(DI)inPHPenhancescodeflexibilityandtestabilitybydecouplingdependencycreationfromusage.ToimplementDIeffectively:1)UseDIcontainersjudiciouslytoavoidover-engineering.2)Avoidconstructoroverloadbylimitingdependenciestothreeorfour.3)Adhe
How to Speed Up Your PHP Website: Performance TuningMay 16, 2025 am 12:12 AMToimproveyourPHPwebsite'sperformance,usethesestrategies:1)ImplementopcodecachingwithOPcachetospeedupscriptinterpretation.2)Optimizedatabasequeriesbyselectingonlynecessaryfields.3)UsecachingsystemslikeRedisorMemcachedtoreducedatabaseload.4)Applyasynch
Sending Mass Emails with PHP: Is it Possible?May 16, 2025 am 12:10 AMYes,itispossibletosendmassemailswithPHP.1)UselibrarieslikePHPMailerorSwiftMailerforefficientemailsending.2)Implementdelaysbetweenemailstoavoidspamflags.3)Personalizeemailsusingdynamiccontenttoimproveengagement.4)UsequeuesystemslikeRabbitMQorRedisforb
What is the purpose of Dependency Injection in PHP?May 16, 2025 am 12:10 AMDependencyInjection(DI)inPHPisadesignpatternthatachievesInversionofControl(IoC)byallowingdependenciestobeinjectedintoclasses,enhancingmodularity,testability,andflexibility.DIdecouplesclassesfromspecificimplementations,makingcodemoremanageableandadapt
How to send an email using PHP?May 16, 2025 am 12:03 AMThe best ways to send emails using PHP include: 1. Use PHP's mail() function to basic sending; 2. Use PHPMailer library to send more complex HTML mail; 3. Use transactional mail services such as SendGrid to improve reliability and analysis capabilities. With these methods, you can ensure that emails not only reach the inbox, but also attract recipients.
How to calculate the total number of elements in a PHP multidimensional array?May 15, 2025 pm 09:00 PMCalculating the total number of elements in a PHP multidimensional array can be done using recursive or iterative methods. 1. The recursive method counts by traversing the array and recursively processing nested arrays. 2. The iterative method uses the stack to simulate recursion to avoid depth problems. 3. The array_walk_recursive function can also be implemented, but it requires manual counting.
What are the characteristics of do-while loops in PHP?May 15, 2025 pm 08:57 PMIn PHP, the characteristic of a do-while loop is to ensure that the loop body is executed at least once, and then decide whether to continue the loop based on the conditions. 1) It executes the loop body before conditional checking, suitable for scenarios where operations need to be performed at least once, such as user input verification and menu systems. 2) However, the syntax of the do-while loop can cause confusion among newbies and may add unnecessary performance overhead.
How to hash strings in PHP?May 15, 2025 pm 08:54 PMEfficient hashing strings in PHP can use the following methods: 1. Use the md5 function for fast hashing, but is not suitable for password storage. 2. Use the sha256 function to improve security. 3. Use the password_hash function to process passwords to provide the highest security and convenience.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
SublimeText3 English version
Recommended: Win version, supports code prompts!
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
Dreamweaver CS6
Visual web development tools
