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I need a standalone email-verification solution I can host myself. The core job is to engineer a tool that reliably flags • invalid email addresses, • spam traps, • temporary or disposable accounts, and • any address likely to bounce before I push a campaign. Realtime SMTP, DNS, and MX checks, plus syntax validation, are all fine approaches as long as the end result is a clean list ready for bulk-mail platforms. Command-line or web dashboard is your choice; an API endpoint in JSON would be a welcome extra so I can feed lists in programmatically. Accuracy and speed matter more to me than fancy UI. Please include a quick outline of your proposed tech stack, the verification logic you plan to use, and a short demo or proof you have tackled similar deliverability problems before. Sample Link: [login to view URL]
Proje No: 40078871
76 teklifler
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I just checked sample video you attached in job posting and there is a source code link in the description of the youtube and I was able to get source code. You can use that as reference for your project I guess and I will do any modification as you want. Please feel free to reach out and lets discuss further. Thanks
$100 USD 3 gün içinde
4,6
4,6
76 freelancer bu proje için ortalama $160 USD teklif veriyor

Hi Carl J P. I’m your web developer, ready to turn your project Custom Email Verification Tool into reality! I’d love to discuss the details and create something amazing together. Feel free to message me anytime, and we can also hop on a quick video or audio call whenever it's convenient for you. I’ve developed many projects exactly like what you’re looking for. If you want to see more relevant samples, just contact me through the chatbox, and I’ll share them instantly. ★ Why Clients Trust Me 500+ successful web projects delivered 430+ positive client reviews Expert in Data Processing, DNS, Email Marketing, Software Development, JSON, Web Development, Backend Development, SMTP, Database Management, API Development WordPress, Shopify, PHP, JavaScript, HTML, CSS, Plugin/Theme Development, Laravel, WebApp Clean, modern, responsive and SEO-optimized designs Fast delivery, great communication, and long-term support Available during EST hours for smooth collaboration If you want a professional developer who delivers quality work on time and stress-free, let’s connect. I’m excited to help build something amazing for you. Best regards, Kausar Parveen
$180 USD 3 gün içinde
6,0
6,0

⭐⭐⭐⭐⭐ Create a Reliable Email Verification Tool for Your Campaigns ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project needs and see you're looking for a standalone email verification solution. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects in email verification. I will build a tool that flags invalid emails, spam traps, and disposable accounts, ensuring you have a clean list for your campaigns. I will use real-time SMTP, DNS, and MX checks, along with syntax validation, to achieve accuracy. Whether you prefer a command-line tool or a web dashboard, I can provide both. An API endpoint in JSON will also be included, allowing you to feed lists programmatically. ➡️ Why Me? I can easily create your email verification solution as I have 5 years of experience in software development, focusing on email validation, API creation, and data processing. My skills include database management, scripting, and system integration, ensuring a robust solution. ➡️ Let's have a quick chat to discuss your project in detail. I can share samples of my previous work that demonstrate my capabilities. Looking forward to our chat! ➡️ Skills & Experience: ✅ Email Validation ✅ API Development ✅ Data Processing ✅ Scripting ✅ Database Management ✅ Real-time Checks ✅ JSON Handling ✅ System Integration ✅ Command-line Tools ✅ Web Development ✅ Project Management ✅ Troubleshooting
$150 USD 2 gün içinde
6,0
6,0

Hi Carl, I understand the critical need for a self-hosted, precise email verification tool that filters out invalid emails, spam traps, disposable accounts, and likely bounces before your campaigns push out. My approach centers on blending realtime SMTP, DNS, and MX record validations with syntax checks to deliver an ultra-clean list primed for bulk mail platforms. Accuracy and speed are top priorities; I’ll propose a lightweight backend API with JSON endpoints, plus a command-line interface for quick access and automation flexibility. Here’s a quick tech outline: Node.js backend for robust API handling, integrated SMTP handshake verification, DNS lookups for MX validation, and smart filtering for disposable or trap emails leveraging community databases. I’ve successfully built email hygiene tools addressing bounce reductions and deliverability improvements for clients, ensuring cleaner campaign receptions. I’ve shared an initial estimate based on your description, and once we go over a few technical or functional details, I’ll confirm the exact cost and delivery schedule. What specific volume of emails do you anticipate verifying daily, and do you require the tool to handle batch jobs or real-time individual verifications? Thanks, Asad
$250 USD 5 gün içinde
5,4
5,4

As someone who understands the critical role of accurate and clean email lists in successful marketing campaigns, I am confident that my skills and expertise make me the ideal candidate for your custom email verification tool. With a dedicated focus on Data Processing and Email Marketing, I ensure that all information is organized effectively and that your campaigns reach the right audience. My Software Development background ensures a thorough understanding of implementing secure, efficient, and user-friendly tools - which aligns perfectly with your mentioned criteria. In approaching this project, I propose using a powerful combination of real-time SMTP, DNS, MX checks alongside syntax validation to ensure comprehensive validation. Furthermore, as per your need, I can offer both a web dashboard-based solution as well as an API endpoint in JSON format for easy programmable list input. Having worked with companies of various scales previously, including E-commerce giants, I have faced and overcome deliverability problems similar to what you describe in your project. With my up-to-date knowledge on E-commerce trends and technologies and my unmatched commitment to providing truly satisfactory results, I am confident that I can deliver a superior and dependable tool tailored specifically to meet your needs.
$250 USD 7 gün içinde
5,4
5,4

Greetings, I see you’re looking for a custom email verification tool that accurately identifies invalid addresses, spam traps, and temporary accounts, ensuring your campaigns reach the right audience. My approach would involve building a robust solution incorporating real-time SMTP, DNS, and MX checks, alongside syntax validation. This will guarantee a clean mailing list ready for your bulk campaigns. For the tech stack, I would recommend using Node.js for the backend, with a PostgreSQL database for efficient data management. Implementing an API endpoint in JSON will allow you to seamlessly feed your lists programmatically. I have tackled similar projects before, focusing on deliverability and accuracy, and I would be happy to share examples of my previous work. Best regards, Mehran Riaz
$180 USD 3 gün içinde
4,1
4,1

Hello, I have carefully reviewed your details and sample video. I am. confident that I will be able to do this job successfully, and previous experience in it. Feel free to message me, I will finish it within 2 days. Kind Regards, -Habib
$120 USD 1 gün içinde
4,3
4,3

⭐If you award me, your smile shows up.⭐ Hi Carl J P. Your project really caught my attention — it’s very similar to one I completed recently. The setup feels familiar, with the same kind of challenges, just a few unique details. That’s actually great news, because it means I already know what works and can move fast without trial and error. Most importantly, I have deep experience and hands-on expertise with API Development, Email Marketing, Data Processing, Web Development, DNS, SMTP, Software Development, Database Management, Backend Development and JSON. In my portfolio, you can find a project similar to yours. https://www.freelancer.com/u/thomasb726 If you’re open to it, I’d love to hear more about what you’re building and share a few ideas from my past experience. ❓ Why clients choose me: ✅ Clear, fast, and proactive communication — you’ll never be left guessing where things stand. ✅ I treat your deadlines and reputation like my own — because once we start, they are. ✅ Easy to talk to, quick to respond, and focused on making your job easier. ✅ I always stand by and support the clients I work with, even long after delivery. Many of my clients stay with me long-term — because I show up, deliver, and don’t disappear. If you’re looking for a project executed with precision and quality, let’s chat soon and get started. Best, Tom
$250 USD 3 gün içinde
3,8
3,8

✅Full Experience in Email Verification GUI App with Python/C# Programming✅. ✳️I am very confident that complete your project perfectly. ✳️I can guarantee the quality of the job and deliver the result on time. I hope we will discuss in more detail via chat. Best regards
$150 USD 3 gün içinde
3,8
3,8

Hi, I can build a self-hosted email verification tool that detects invalid addresses, spam traps, disposable emails, and likely bounces using syntax, DNS/MX, and SMTP checks. Accuracy and speed will be the priority. You’ll get a standalone solution (CLI or web) with optional JSON API and clear deployment docs. Best regards, Shakila Naz
$80 USD 7 gün içinde
3,9
3,9

I can build a self-hosted email verification solution that flags invalid addresses, spam traps, disposable emails, and likely bounces using real-time syntax, DNS, MX, and SMTP checks. I’ll deliver a fast, accurate core engine with a simple CLI or web dashboard and an optional JSON API for programmatic list verification. I’ll outline the verification logic, proposed tech stack, and share relevant experience with email deliverability systems as part of the kickoff.
$85 USD 3 gün içinde
3,6
3,6

Hello, I can build a self-hosted email verification solution focused on accuracy and speed, including syntax validation, DNS/MX checks, real-time SMTP verification, detection of disposable domains, spam traps, and high-bounce risk addresses. I have experience building deliverability and validation tools for bulk email workflows and can provide a lightweight CLI or web dashboard, plus a JSON API for programmatic list verification. The system will be optimized for fast processing and clean, campaign-ready output.
$140 USD 7 gün içinde
4,5
4,5

Hi, I can build a fast, self-hosted email verification solution focused on accuracy and deliverability rather than UI bloat. The system will perform syntax validation, DNS/MX checks, real-time SMTP probing, and detection of disposable domains and known spam traps, producing a clean, campaign-ready list. I can deliver this as a CLI tool or lightweight web dashboard, with an optional JSON API for programmatic list uploads. I’ll also outline the full tech stack, verification logic, and share a brief demo or prior experience handling email deliverability and bounce-prevention workflows. Thanks Abdul Kader
$40 USD 2 gün içinde
3,4
3,4

Hello Carl J P., I am Maryam Abbas, a Backend Developer with 4 years of experience in Backend Development, Web Development, API Development, and Software Development. I have carefully reviewed your requirement for a Custom Email Verification Tool. To address this project, I propose utilizing a combination of Realtime SMTP, DNS, and MX checks, along with syntax validation to ensure accurate email verification. I will design a solution that efficiently identifies invalid email addresses, spam traps, temporary accounts, and potential bounces before sending campaigns. The tool will provide a clean list for bulk-mail platforms, with the option of a command-line interface or web dashboard. Additionally, I can include an API endpoint for seamless list integration. Please review my portfolio at https://www.freelancer.pk/u/maryam951 and let's discuss your project further. Best regards, Maryam Abbas
$30 USD 2 gün içinde
3,2
3,2

I NEVER USE AI FOR BIDDING! You want a self-hosted email verification tool that flags invalids, spam traps, bounces, and disposables, with support for realtime checks and an optional API. Engineered reliable email verification tools for bulk mail workflows, so this fits my wheelhouse. Looking forward to discussing more details. Languages: Python, Node.js Backend: Express, FastAPI Verification: Regex, DNS/MX lookup, SMTP handshake, disposable/spamtrap database Interface: CLI, REST API (JSON), optional web dashboard Proof: Built deliverability platforms integrating similar email hygiene logic
$139 USD 1 gün içinde
3,4
3,4

Hello, I am senior developer and server administrator. I already have experience with developed similar kind of domain and email validation tool. I can create you required email validation tool web based (PHP or ASP.NET Core & C#) or C# windows application. I suggest web based application for you. Please contact me via chat Thank You
$250 USD 3 gün içinde
3,6
3,6

Hi Carl, I’m Robert, a Senior Full-Stack & AI Engineer with over 10 years of experience architecting and delivering SaaS platforms, automation systems, and intelligent applications, highlighting my top 3 strengths: API Development, DNS Management, and Backend Development. I developed a robust email verification system that accurately flags invalid addresses and spam traps, ensuring effective campaign deployment. My solution incorporates real-time SMTP and DNS checks alongside detailed syntax validation for reliable results. My deep technical background in full-stack and AI engineering aligns with your goal of a clean, accurate email list ready for bulk campaigns. I can complete this project perfectly and deliver scalable, production-ready results. I am committed to clean architecture, structured documentation, CI/CD automation, and OWASP-based security practices. Let’s connect to refine your requirements and begin building a solution that exceeds expectations. What specific features or metrics are most important for the email verification tool's performance?
$200 USD 10 gün içinde
3,2
3,2

Hi Carl, I’m Sean, a Full-Stack Developer with over 5 years of experience in building scalable applications, API development, and smart data processing, particularly in email verification. I've successfully developed a robust email verification tool for a previous client that achieved over 99% accuracy in detecting invalid and disposable addresses. My skills in SMTP, DNS validation, and backend data processing align perfectly with your requirements. I can do this project perfectly. I typically deliver this scope in 14 days, ensuring it is ready for integration into your bulk-mail platforms. For quality and security, I will implement thorough tests, maintain clean code, and provide clear documentation. The tech stack will include Node.js with Express for the API, and MongoDB for database management, leveraging real-time SMTP and DNS checks. What specific features would you like included in the API to enhance your email verification process?
$250 USD 14 gün içinde
2,8
2,8

Dear Carl J P.. Thanks for sharing your project! I’ve worked on similar projects before and have hands-on experience with tasks like yours. I’ve got a bunch of hands-on experience with JSON, Web Development, DNS, Database Management, Software Development, Email Marketing, Backend Development, API Development, SMTP and Data Processing, so I’m comfortable handling everything you’re looking for. If you want to see my work quality, please feel free to check my reviews from previous clients. I can also show examples of previous projects and walk you through my workflow, including clear communication, clean execution, and a professional approach from start to finish. Feel free to message me anytime. I’d be happy to discuss your project and get started. Best Regards, Huy.
$155 USD 4 gün içinde
2,8
2,8

Hello, I understand you need a custom email verification tool to identify invalid, spam, disposable, and potentially bouncing email addresses for your campaigns. I will develop a solution with real-time SMTP, DNS, and MX checks, along with syntax validation, ensuring a clean list for bulk-mail platforms. I can provide a command-line interface or a web dashboard and include an API endpoint in JSON for automated list processing. With expertise in JSON, API Development, Backend Development, Software Development, and Web Development, I am well-equipped to handle this project. Could you please provide more details on the expected volume of email addresses and any specific requirements for the verification logic? I assure you of seamless communication and a robust solution to enhance your email campaign efficiency. Best regards, Umar
$250 USD 7 gün içinde
2,8
2,8

Hello Carl J P., We would like to grab this opportunity and will work till you get 100% satisfied with our work. We are an expert team which have many years of experience on Data Processing, DNS, Email Marketing, Software Development, JSON, Web Development, Backend Development, SMTP, Database Management, API Development Please come over chat and discuss your requirement in a detailed way. Regards
$140 USD 7 gün içinde
2,6
2,6

Miami Lakes, United States
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