When you verify email addresses through our system, each result falls into a specific status. Here’s what each one means:

Safe: This is a verified email address with no known risks. It is active, accepting messages, and generally belongs to a real individual. These are the safest addresses to email.

Role: These are also valid addresses, but they’re assigned to a group or department, not a specific person. Examples include support@ or info@. Although safe, these addresses often don’t get personal replies.

Catch-All: These domains accept all emails regardless of whether a specific address exists. It means the domain’s server doesn’t reject invalid emails, making it harder to tell if the specific address is truly active. Emails may still deliver, but soft bounces are possible.

Disposable: These are temporary addresses, typically valid for only a short time (like 10 minutes to 1 hour). People often use them for one-time signups and never check them again.

Invalid: These addresses don’t exist or are incorrectly typed. Emails sent here will bounce back.

Inbox Full: The user’s inbox has reached its storage limit and cannot accept new messages. Once they free up space, the address may become usable again.

Disabled: This email account was once active but has been deactivated by the provider. For example, Gmail may suspend an account for violating policies.

Spamtrap: These addresses are created to identify spam activity. They don’t belong to real users and are used by ISPs to catch senders scraping or spamming emails. Sending to spamtraps damages your sender reputation.

Unknown: Our system couldn’t determine the status, often due to server restrictions. These addresses don’t cost you any credits. Your credits are automatically refunded for these results.

It can be frustrating to see emails bounce back even after they are marked as “Safe” or “Valid” by the email verifier. However, it’s important to understand that these terms only indicate that the mailbox exists and is capable of receiving emails at the time of verification. Several external factors can still cause delivery issues afterward. Here’s a deeper look at why this can happen:

1. Incorrect Technical Configuration: Even if the recipient’s email is valid, your own email setup must be technically sound. If your domain lacks proper configuration of SPF, DKIM, rDNS, or HELO headers, the receiving server might reject your message. These are security and authentication protocols that help verify the legitimacy of your email. Without them, your message could be flagged as suspicious.

2. Temporary Server Issues (Soft Bounces) A valid address can still temporarily reject incoming emails if the recipient’s server is overloaded, under maintenance, or dealing with too many requests at once. These are known as soft bounces, and they don’t necessarily mean your email is bad—just that the timing wasn’t right.

3. Rate Limiting by the Recipient’s Server: If you send too many emails in a short period, some email providers (especially corporate or academic ones) might throttle your messages or temporarily block them. This is especially true when using bulk or cold email strategies. These bounces are not related to the address being invalid, but rather a safety mechanism against spam.

4. Content-Related Filters: Your email might be perfectly valid and verified, but if your message contains spammy keywords, excessive links, poor HTML structure, or lacks personalization, it could trigger the recipient’s spam filters. In some cases, the message is not delivered at all and results in a bounce.

5. Bad Domain or IP Reputation: Even the best email list won’t help if your sender domain or IP address is flagged as suspicious. If your sending reputation is poor due to previous spam complaints, blacklists, or bad engagement rates, receiving servers may block your messages regardless of recipient validity.

6. Greylisting or Manual Blocking: Some mail servers use greylisting, which initially rejects a message from an unfamiliar sender, asking your server to try again. If your server doesn’t retry, the message bounces. Additionally, if someone manually marks you as spam, future emails could be automatically rejected.

Bottom Line: A “Safe” or “Valid” status means the mailbox is real and reachable, not that your message is guaranteed to be delivered. To truly ensure high deliverability, you need to pair good list hygiene with proper technical setup, solid domain reputation, thoughtful content, and a warm sending pattern.

Even if the email addresses in your list are valid, your emails can still bounce due to how they are sent or structured. To minimize bounces and improve overall deliverability, here are several best practices you should follow:

1. Use clean, well-formatted email content: Make sure your emails are written in natural, conversational language. Avoid using excessive bolding, all caps, or spammy trigger words like “free,” “buy now,” or “urgent.” Format your HTML emails properly, and always include a plain-text version as well. A clean design signals professionalism and builds trust with email providers.

2. Warm up your domain and IP gradually: If you’re sending emails from a new domain or IP address, don’t blast out thousands of emails right away. Instead, gradually increase the number of emails you send over a few weeks. This warming-up process helps build a positive sender reputation and avoids being flagged by spam filters.

3. Avoid sending too many emails in a short time: High email volume in a short time from the same sender can look suspicious to email servers. Use throttling or time-based sending to spread out deliveries. Especially for cold outreach, send in small, timed batches instead of all at once.

5. Use a reputable sending domain: Your sender domain should have a good reputation. Avoid using domains that have been previously blacklisted. Use your own domain (not free ones like Gmail or Yahoo) for professional campaigns. Tools like MXToolbox or Talos Intelligence can help you check your domain reputation.

6. Limit tracking and external links: Too many links—especially third-party tracking links—can trip spam filters. Use links sparingly and ensure they go to secure (https) destinations. Avoid URL shorteners like bit.ly unless you’ve verified they’re trusted by major ISPs.

7. Configure your DNS records correctly: Your domain should have properly set up SPF, DKIM, and DMARC records. These DNS records authenticate your email server and prove that your emails are coming from you—not a spammer. This step is critical for inbox delivery.

💡 Pro Tip: Consider using a dedicated email deliverability tool or warm-up service if you’re sending cold emails or launching a new campaign. These tools automate the warm-up process, monitor blacklist status, and simulate engagement to improve sender reputation.

Following these steps not only helps reduce bounces but also increases your inbox placement, open rates, and overall campaign performance.

Credits are the internal currency you use to verify email addresses on our platform. One credit equals one successful email verification—simple, transparent, and predictable.

For example, if you upload a list with 100 emails, you’ll spend exactly 100 credits—no hidden costs, no extra processing fees.

We use a pay-as-you-go pricing model, meaning you only purchase the credits you need, when you need them. There’s no subscription or recurring billing. Whether you’re verifying a small list or cleaning hundreds of thousands of contacts, you’re fully in control of your spending.

Our credit bundles start as low as 5,000 credits for $10 and scale all the way up to 1,000,000 credits for $1,000. The more you purchase, the better value you get—plus, most plans include bonus credits at no extra cost. For instance, when you buy 50,000 credits for $65, you’ll actually receive 52,500 total credits because of the +2,500 bonus we add automatically. These bonus credits are applied instantly and are treated exactly the same as regular credits.

Every credit—bonus or base—can be used for full email verification tasks without limitations.

So in short: buy credits based on your needs, use them anytime, and enjoy automatic bonus perks built right into our pricing.

Absolutely! Our platform is built to handle real-world data formats—so you don’t need to trim or restructure your spreadsheet just to run a verification.

You can upload a CSV file containing multiple columns, and we’ll automatically detect the column that contains email addresses. Our system uses intelligent detection based on either the column headers (like “email”, “Email Address”, etc.) or the data format itself to find the correct field.

For example, if your CSV includes columns like Name, Company, Email, Phone, you can upload the entire file as-is. During verification, we’ll process only the email column, and your original structure will stay completely intact.

Once verification is complete, we’ll return the same file back to you—but with extra columns added. These include details like:

Verification Status (Safe, Invalid, Catch-All, etc.) Deliverability Info Reason or Error Message Suggestions (if applicable)

This makes it easy for you to match verification results with your existing customer data, without needing to reformat or merge anything.

In short: just upload your list and we’ll handle the rest—no cleanup, no stress, and no lost data.

No, your credits will never expire. We operate on a pay-as-you-go model, and that means once you purchase credits, they’re yours to use—whenever you want. Whether you choose to verify a few emails today or save them for a larger campaign months later, your credits will always remain available in your account until you use them.

There are no hidden expiration dates, no time-based limitations, and no pressure to rush through your verification tasks. This is especially helpful if you run periodic campaigns or handle email lists at different stages of your business.

You’re in full control—buy what you need, when you need it, and rest assured your credits will stay intact until you choose to use them.

We believe that flexibility is key when managing your marketing or outreach, and our credit system is designed to support that freedom.

On average, verifying a list of 50,000 email addresses takes around 15 to 25 minutes, depending on a few important factors. While we strive to maintain fast and efficient service, there are natural variables that can influence processing time:

1. Email server responsiveness: Some mail servers respond instantly, while others are slower or intentionally delay their responses to prevent spam. For example, free email providers like Gmail and Yahoo often introduce delays when too many verification requests hit their servers in a short time.

2. Quality of your list: If your list contains a high number of invalid, catch-all, or greylisted addresses, our system must perform extra checks to avoid incorrect labeling. These additional validations can extend the total processing time slightly—but they help ensure accuracy.

3. Concurrent server load: During peak hours, when multiple users are submitting large verification tasks at once, your task might be placed in a short queue. That said, we monitor server activity closely and automatically scale up resources by deploying new verification nodes as needed, helping reduce delays.

Your uploaded data is treated with the highest level of care and security. Once you upload a file for email verification, it’s stored securely within our system—but only for 15 days.

⏳ Automatic deletion after 15 days: To protect your privacy and reduce unnecessary data retention, we automatically delete all uploaded files after 15 days. This includes both the original file and the verification results. If you think you might need your results later, we strongly recommend downloading them as soon as the task is complete.

🔐 No data sharing, ever: We never share, sell, or analyze the contents of your uploaded files. Your data stays completely private and is accessible only to you. Our servers are protected with industry-standard security measures to ensure that your sensitive information remains safe at all times.

In short, your data is yours alone. We hold it just long enough for you to view and download your results—and then we erase it permanently. You’re in full control, and we’re committed to respecting that.

We’re here to help! If something’s unclear or you need assistance, don’t hesitate to contact us. We’re always happy to walk you through anything you need.