What is CampaignKit?

CampaignKit provides a robust Email Validation Service designed to enhance email marketing effectiveness by cleaning email lists. It helps users reduce bounce rates and remove low-quality contacts, which is crucial for protecting their sender score. This service ensures that marketing messages reach genuine recipients, thereby improving overall campaign performance and engagement.

The platform performs comprehensive checks including mailbox deliverability tests without sending actual emails, detection of disposable email addresses from a vast database of over 3000 temporary email services, and identification of common catch-all email addresses. It also validates email syntax, verifies domain existence and configuration for email acceptance, and assigns a quality score to each email address for better assessment. Users can integrate this validation service into their existing workflows using CampaignKit's API, although API access details may vary.

Features

Email Validation Service: Cleans email lists to reduce bounces and remove low-quality contacts, protecting sender score.
Mailbox Deliverability Check: Tests if a target email server accepts emails for a given mailbox without sending an actual email.
Disposable Email Address Detection: Identifies over 3000+ domains of temporary email services.
Catch-All Detection: Detects common catch-all email addresses associated with low open rates.
Syntax Validation: Instantly detects and flags email addresses with invalid syntax.
Domain Checks: Verifies the email domain's existence and its configuration to accept emails.
Quality Score: Assigns a score to each email address to rate its overall quality and validity.
Bulk Email List Cleaning: Allows users to upload email lists (e.g., as CSV) for comprehensive verification.

Use Cases

Cleaning email marketing lists to improve deliverability and engagement.
Reducing email bounce rates to maintain a healthy sender reputation.
Verifying customer email databases to remove invalid and risky contacts.
Filtering out disposable or temporary email addresses from sign-up forms.
Identifying catch-all email addresses to refine audience segmentation.
Improving the accuracy of email data before launching outreach campaigns.

FAQs

How do you protect my data?

We keep submitted email addresses during the lifetime of the validation. No email addresses are stored on CampaignKit's servers nor do we forward the email addresses to any 3rd party service. All communication between you and the CampaignKit servers is encrypted.
Do you send emails during the validation?

No. No emails are ever send to the recipient's mailbox.
How do you perform mailbox deliverability validation?

The validator tries to connect to the recipient's mail server, issues a MAIL command (using an email address from the validator not associated with you) followed by an RCPT command with the email address. Email servers respond with some defined response codes and additional information. This is used to detect if the mailbox is available. Instead of continuing the session, the connection will be closed (no email will be sent).
Does this work for ESPs like gmail?

Yes. Mailbox deliverability validation works for ESPs like gmail.com, icloud.com, yahoo.com. Some providers may impose penalties for too many connection attempts, temporarily rejecting new connections, which requires the validator to slow down.
Do I need to buy credits?

Yes. You buy credits depending on your needs. A credit is only used for successfully validated emails. You don't pay for syntax failures. You get 25 email validations for free upon signup.