New Feature: Email Verification – Real-time list cleaning
We are excited to introduce a powerful enhancement to Kasplo – Email Verification, A real-time contact list cleaning. This new capability allows you to instantly validate and clean your contact lists, ensuring your email campaigns reach verified, engaged recipients.
With this feature, you can:
Verify email addresses in real-time: Instantly identify the validity of each email address in your list, classifying them based on verification outcomes.
Clean your contact lists: Remove invalid, risky, or undeliverable email addresses from your lists automatically, improving deliverability.
Maintain a high-quality database: Keep your global contact database free from low-quality or problematic addresses, ensuring better campaign performance.
This functionality is seamlessly integrated into your Kasplo account, allowing you to clean and optimize any list before adding it to your global contact database or specific marketing lists.
How it works: Real-time email verification system
Our verification process uses advanced SMTP checks and server-level diagnostics to accurately classify each email address, ensuring only verified and safe addresses are used for campaigns:
- DNS & MX Record lookup: Identifies if the recipient’s domain is configured to receive emails.
- SMTP handshake: Establishes a direct connection with the recipient’s mail server for real-time verification.
- Mailbox validation: Verifies the existence of the recipient’s mailbox using standard email protocol commands.
- Response code analysis: Interprets server responses to classify the email status with precision.
- Status assignment: Each email is categorized based on server behavior and response codes.
Email verification statuses explained
Kasplo uses a clear, color-coded classification system to indicate the status of each email address in your list:
| Status | Send/Not | Description | Action Recommendation |
| Good | Yes | Fully verified and deliverable mailbox. Safe to send. | Send confidently without any risks. |
| Unverified | Yes (Cautious) | Unable to confirm mailbox (e.g., catch-all domains like Gmail). Safe for known domains. | Send with caution for unknown domains. |
| Greylisted | Retry (6-12 hours) | Temporarily deferred by the recipient’s server. Retry in 6–12 hours. | Automatically retry later. |
| Timeout | Retry (6-12 hours) | No response from the server (may be temporary). | Retry verification after a few hours. |
| BadEmail | No | Invalid mailbox—will hard bounce if sent. | Remove immediately from your list. |
| Bad | No | SMTP error or rejected connection (unauthorized, blacklisted). | Investigate sender reputation or domain issues. |
| Unknown | No | Domain or server unreachable (DNS or MX issue). | Review domain configuration and retry. |
| Skipped | No | Verification was bypassed due to billing issues. | Resolve billing or account issues. |
Why this matters for your email campaigns
Higher Deliverability: By sending only to verified addresses, your emails are more likely to land in inboxes, not spam folders.
Reduced Bounce Rates: Eliminate the risk of hard bounces that damage your sender reputation.
Cleaner Lists, Better Engagement: Maintain a healthy database by removing invalid or risky contacts, leading to higher open and click rates.
Seamless List Management: Easily clean, validate, and upload contact lists to any marketing list or your global contact database.
Start sending smarter with Kasplo
Refer to this to understand Email Verification in deatil. Get a clean & precise list, now available for all eligible users at app.kasplo.com.