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I have a promotional-lead list containing well over 50,000+ addresses and I want every message I send to land in the inbox, not the spam folder. Your task is to run a complete activation, validation and verification pass that strips out hard bounces, spam traps, disposables and other problem contacts so the final list is fully send-ready. You may use any of the established verification platforms—NeverBounce, ZeroBounce, Kickbox, etc.—as long as the results are accurate and independently exportable. Please keep my original CSV structure intact (custom fields included) so the cleaned file can be dropped straight back into my ESP. Deliverables I need from you: • Cleaned CSV containing only “safe to send” addresses • Companion file (or flag column) listing every rejected address with its precise status code • A short summary report outlining overall hygiene stats and any recommendations to maintain high deliverability going forward Acceptance criteria: 1. Minimum 98 % deliverable rate on the cleaned list when spot-tested. 2. Turnaround time no longer than 72 hours from project start. 3. All data handled confidentially and returned via secure link. If you’ve tackled high-volume promotional lists before and can prove strong inbox placement results, I’m ready to award quickly so we can get this list cleaned and campaigns rolling.
Project ID: 40411145
24 proposals
Remote project
Active 5 days ago
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24 freelancers are bidding on average $128 USD for this job

Hi! I can handle the full 50,000+ lead validation to ensure you hit that 98%+ deliverability rate. I will use a reliable bulk email verification service that I personally use for all my contact lists. I'm ready to clean a 100 sample records for you before you award me the job. I’ll strip out hard bounces, spam traps, and disposables while keeping your original CSV structure perfectly intact. You’ll receive the cleaned "safe-to-send" file, a detailed rejection log with status codes, and a strategic hygiene report within 48 hours. I prioritize data confidentiality and am ready to secure your inbox placement immediately—let’s get these campaigns rolling!
$75 USD in 1 day
6.7
6.7

Hello, Thank you for considering my services. My proposed timeline is as follows: 5 business days to clean your contact list. A minimum of 30 business days to complete the sending process. Please note that during the sending phase, additional invalid contacts may be identified. Let me know if you’d like to proceed or discuss further. Best regards, Ilirjan
$400 USD in 40 days
6.3
6.3

Hello, I can help you clean and validate your 50,000+ email list to ensure maximum inbox deliverability and ESP safety compliance. I have experience working with large-scale email hygiene processes, including segmentation, validation workflows, and preparing lists for high-deliverability cold outreach campaigns. What I will deliver: • Fully cleaned CSV with only “safe to send” emails • Separate file/column with rejection reasons (hard bounce, spam trap, disposable, invalid, etc.) • Preserved original structure and custom fields • Deliverability-optimized list ready for ESP upload • Summary report with hygiene insights and recommendations My process: • Run full validation using tools like ZeroBounce / NeverBounce / Kickbox • Remove high-risk addresses (spam traps, invalids, catch-all risk flags where needed) • Deduplicate and normalize records • Ensure structure remains unchanged for direct ESP import Quality focus: • Target ≥98% deliverable confidence level • Strict handling of suppression and risky domains • Confidential and secure data processing • Fast turnaround within your 72-hour requirement I’m ready to start immediately and can prioritize this for quick delivery. Best regards, Shahadat Hossain
$100 USD in 3 days
6.2
6.2

Warm greetings, cleaning high-volume email lists for inbox placement (not spam) is exactly our specialty. We ensure safe-to-send data with verified accuracy and full transparency. Here’s how we can help: * Multi-layer validation (NeverBounce/ZeroBounce/Kickbox cross-check) * Remove bounces, spam traps, disposables, risky domains * Preserve full CSV structure with custom fields intact * Deliver cleaned list + rejected list with status codes * Summary report with hygiene stats + deliverability tips We’re a team of 62 professionals with 9+ years in email marketing and data processing. What ESP are you using, and do you want us to segment the final list (high/medium risk) or only “safe to send”?
$140 USD in 7 days
5.5
5.5

Hi there, I’d be happy to assist with your project. I have experience handling similar work and am confident I can deliver a high-quality result. I’d appreciate the opportunity to work with you and look forward to your response. Thank you.
$30 USD in 7 days
5.2
5.2

With over a decade of professional experience in programming, server administration, support, and troubleshooting, I am more than equipped to tackle the complex challenge of cleaning your promotional-lead list. My keen attention to detail, strong email handling skills and wide knowledge of email deliverability verification platforms like NeverBounce, ZeroBounce, and Kickbox make me the perfect fit for this job.
$140 USD in 7 days
4.7
4.7

With my diverse skillset in Data Entry, Data Processing, and Email Handling, I'm more than equipped to tackle your project of cleaning up and verifying your bulk email list. Detail-oriented and tech-savvy, you can rely on my fast yet accurate data entry abilities to clean your list thoroughly while keeping the original CSV structure intact—an imperative requirement for easy integration into your ESP Having handled high-volume promotional lists before, I understand firsthand the paramount importance of maintaining an impressive deliverability rate. To ensure this, I'm well-versed in using established verification platforms such as NeverBounce and ZeroBounce. My familiarity with these tools combined with my commitment to precision will guarantee minimum 98% deliverability on the cleaned list when spot-tested—a feat I'm confident we can achieve together. Apart from delivering a clean CSV file and comprehensive report within a swift turnaround time (not exceeding 72 hours), I assure you that all the data handled during our project will be treated with utmost confidentiality and returned via secure link. I genuinely appreciate the value of your time and rest assured that our communication will be clear, effective, and consistent throughout our engagement. Let my proven expertise in data management amplify your campaigns' success by optimizing the professional relationship we're about to build.
$30 USD in 1 day
4.4
4.4

Hello, This is Farrukh, currently working as an Outreach Assistant in the Energy sector. Bulk Verification of emails is something I do on daily basis. I can verify all 50K+ emails, turnaround time will be within 3 days (72 hours), and the deliverability rate will be 99% and above. I will be using a mix of 3 tools here, "No2Bounce", "BounBan", and "Reoon". These 3 tools help where NeverBounce and ZeroBounce fail. Feel free to reach out. I'm also open to the trial phase if you would like to see how things are going. Thank you!
$250 USD in 3 days
4.4
4.4

With my extensive skills in data analysis and email marketing, I'm confident in being able to deliver beyond your expectations for this project. Throughout my career, I've handled numerous high-volume promotional lists like yours, always ensuring excellent deliverability rates and effective inbox placement. Moreover, I have hands-on experience with the verification platforms you mentioned—NeverBounce, ZeroBounce, Kickbox— so I'll be able to clean your massive list efficiently without jeopardizing its original structure. Maintaining a confidential approach towards your data is key and in this aspect, my agency Aesthetic Logic has a solid reputation. Our intelligent handling of client information ensures absolute security and will certainly apply to your project as well. In addition to providing you with a cleaned CSV file containing only "safe to send" addresses, we'll also furnish you with a detailed companion file or flag column featuring rejected email addresses and their precise status codes.
$140 USD in 3 days
4.3
4.3

Dear Hiring Manager, I’m very interested in your email list cleaning project and have experience handling large-scale promotional datasets with a focus on deliverability. Approach: I will run your list through trusted verification tools such as NeverBounce, ZeroBounce, or Kickbox, followed by an additional validation layer to ensure maximum accuracy. I will remove hard bounces, spam traps, disposable emails, and risky contacts while preserving your original CSV structure. Deliverables: • Clean, send-ready CSV (only verified safe emails) • Rejected list with detailed status codes (bounce, spam trap, disposable, etc.) • Summary report with hygiene statistics and recommendations to maintain high inbox placement Timeline: I can complete the full process within 48–72 hours while ensuring high accuracy and data security. I understand the importance of inbox placement and will ensure your final list meets the 98%+ deliverability target. I’m ready to start immediately and can share a sample validation if required. Best regards, Prianka
$120 USD in 3 days
3.6
3.6

As an experienced Full Stack Developer and Digital Solutions Expert, I have not just interacted with bulk email campaigns, but also deployed comprehensive solutions to ensure a fruitful inbox landing. I have successfully completed similar projects to yours, helping businesses improve their deliverability rates and boosting their promotional strategies. With over 10 years of experience under my belt, delivering quality results within strict deadlines is my second nature. My broad skillset doesn't just stop at Email Marketing and Internet Marketing - it extends to API Development & Integrations which might come in handy for seamless export/import of data between platforms. My 100+ successful projects speak to my proficiency in streamlining large scale operations with meticulous attention to detail. Let me put all this know-how into cleaning your email list and efficiency giving you a minimum 98% deliverability rate without compromising security and confidentiality.
$140 USD in 7 days
3.4
3.4

Greetings, I see you need help cleaning up a promotional email list of over 50,000 addresses to ensure your messages reach the inbox instead of the spam folder. I can assist by utilizing trusted verification platforms like NeverBounce or ZeroBounce to validate and verify your list. My approach will focus on removing hard bounces, spam traps, and disposable emails, while keeping your original CSV structure intact. You'll receive a cleaned CSV file with only the “safe to send” addresses, along with a companion file detailing the rejected addresses and their status codes. Additionally, I’ll provide a summary report with hygiene stats and recommendations for maintaining high deliverability in the future. I have experience with high-volume lists and can ensure a minimum 98% deliverability rate. Best regards, Muhammad Arshman
$70 USD in 3 days
2.3
2.3

Hi there, I will process your 50k+ list using premium verification tools (ZeroBounce/NeverBounce) to eliminate hard bounces, spam traps, and disposables, guaranteeing a 98%+ inbox deliverability rate. I will maintain your exact original CSV structure and securely deliver the "safe-to-send" list, the detailed rejection log with status codes, and a hygiene summary report within 24-48 hours. Ready to start immediately!
$120 USD in 1 day
2.2
2.2

Hi, I’ll clean and verify your 50,000+ email list to ensure high deliverability and inbox placement. What you’ll get: * Fully cleaned CSV with only “safe to send” emails * Removal of bounces, spam traps, disposables, and risky contacts * Rejected list with clear status codes (bounce, invalid, etc.) * Original CSV structure preserved with all custom fields * Summary report with deliverability stats and recommendations I’ll use trusted tools like NeverBounce or ZeroBounce to ensure accuracy and reliability. I’ve completed similar list-cleaning projects with 5⭐ feedback for accuracy and delivery. Timeline: within 48–72 hours Budget: $105 total Please send me a message so we can get started immediately!
$105 USD in 2 days
2.4
2.4

Dear Client. I read your requirements carefully and I understand what you need. You need a large email list cleaned and verified while keeping the original CSV structure and custom fields intact. I will ensure: * validation through a trusted email verification platform * removal of hard bounces, disposables, spam traps, and risky addresses * cleaned CSV with only safe-to-send contacts * rejected list with clear status codes * short hygiene summary report * confidential and secure file handling Quick question: do you already have a preferred verification platform account, or should I use my recommended tool for the process? I look forward to working with you. Thank you for reading. Aiman.
$150 USD in 3 days
1.5
1.5

Take your email marketing campaigns to the next level with my skills and experience specifically tailored to bulk marketing and internet marketing. My track record of creating and implementing successful strategies is proven, which is essential for a project as sensitive as cleaning an email list. With over 50,000 addresses, I understand that you need an accurate yet efficient process. I have mastered several verification platforms - NeverBounce, ZeroBounce, Kickbox - that will ensure not only accuracy, but also allow independent exportation for your convenience whilst maintaining the structure of your CSV file intact. Moreover, detail-oriented and result-driven, I always prioritize quality work and timely delivery. I guarantee a minimum 98% deliverable rate within a 72-hour turnaround time. As a freelancer who has been trusted repeatedly to handle confidential data with utmost security, you can rest assured that every single piece of information you provide will be treated with absolute confidentiality. By choosing me for this project, you're not only gaining access to my technical expertise but benefiting from my unwavering commitment to helping businesses grow and my knack for efficient communication. Let's get started and get your campaigns rolling stronger than ever!
$140 USD in 7 days
0.3
0.3

Hi there, I understand you need a high-volume email hygiene cleanup that preserves your original CSV structure while delivering an inbox-ready list with full provenance of rejected addresses. I can run a robust activation, validation, and verification pass using trusted platforms (NeverBounce, ZeroBounce, Kickbox, or equivalent) and export a clean, ready-to-upload file along with a detailed rejection log and an actionable hygiene summary. Solution I will deliver: - End-to-end validation using industry-leading verifiers with independent exportable results - Strict filtering: remove hard bounces, spam traps, disposables, and low-deliverability domains while preserving custom fields - Final CSV remains in your original schema; includes a companion file or flag column listing each rejected address with precise status codes - Short hygiene report with actionable recommendations to sustain high deliverability (domain warm-up, suppression lists, cadence, and bounce handling) - Secure delivery via a private link and NDA-compliant handling Deliverables: - Cleaned CSV containing only safe-to-send addresses (same structure as input) - Companion file/flag column with exact status codes for all rejections - Summary report with hygiene stats and forward-looking recommendations - Clear, shareable audit trail for all verification steps Timeline & Budget: - 72 hours turnaround maximum; I’ll start immediately and report progress daily - Fixed project bid: 250 USD (fits your 30-250 USD rang
$190 USD in 3 days
0.0
0.0

Hello, I’m Ankur, a freelance developer with a dedicated team of professionals. I read all your requirements for website and I assure you that I will provide high-quality work at the proper time. Additionally, we also provide you 3 months of support from our side. As a Full Stack Developer, I specialize in Web and App Development, boasting a portfolio of stunning projects with top-notch UI/UX design. My expertise spans Flutter (for both Android and iOS), PHP, and WordPress, and I bring over 7 years of experience to the table. Whether it’s websites, applications, or e-commerce platforms, I’ve got you covered. But I’m not limited to just coding. My skill set extends to graphic design and logo creation, offering you a one-stop solution for all your project needs. With a track record of over 500 completed projects, I am committed to delivering nothing short of excellence. My ultimate goal is your complete satisfaction. Thank you for considering me for your project. I’m ready to transform your vision into a reality that stands out in today’s competitive landscape. Best Regards, Ankur Hardiya
$140 USD in 7 days
0.0
0.0

Hi, I have experience handling large-scale email list cleaning and verification while maintaining data accuracy and confidentiality. I can validate your CSV using trusted verification workflows, preserve the original structure and custom fields, and provide detailed status reporting for rejected addresses. I focus on deliverability optimization, bounce reduction, and organized reporting to help improve inbox placement and maintain long-term email campaign performance Best Regards! Shafqat Rai
$30 USD in 1 day
0.0
0.0

⏱️ 24–48 hours (well within your 72h requirement) Cleaning a 50k+ list isn’t just filtering—it’s about protecting your sender reputation and inbox placement. I’ll run a full verification pass so your campaigns hit inbox, not spam. How I’ll handle your list 1. Multi-Layer Verification Use trusted tools like ZeroBounce / NeverBounce / Kickbox Remove: Hard bounces Spam traps Disposable/temporary emails Invalid/abuse/role-based risky addresses 2. Data Integrity Preserve your exact CSV structure (all custom fields intact) No column loss or format issues 3. Clean Segmentation “Safe to send” list (high deliverability) Rejected list with precise status codes: invalid / catch-all / risky / unknown 4. Deliverability Focus Aim for 98%+ deliverable rate Optional: flag borderline “catch-all” separately (your choice to include/exclude) Deliverables Cleaned CSV (ready for ESP upload) Rejection report with status breakdown Summary report: Hygiene stats Risk insights Best practices for ongoing deliverability Timeline Key Strength I focus on accuracy + inbox placement, not just cleaning numbers. I can start immediately and handle your data securely.
$50 USD in 7 days
0.0
0.0

Abuja, Benin
Payment method verified
Member since Sep 21, 2025
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