Home Help Center Email Marketing Service Email Campaigns Validating contacts before sending: Email Checker explained
A short instruction to start your email marketing journey
How to start and complete onboarding Tracking your onboarding progress: a step-by-step guide Claiming your onboarding reward and using the coupon code What happens if you skip or end onboarding early
Email & contact metrics Understanding email performance metrics: Sent, Deliverability, Open rate, Click rate Why the number of sent emails doesn't match your contact list Working with recent lists
Creating an account on Sendigram Recovering your Sendigram account password Changing your Sendigram password Changing your account login (email address) Deleting your account
Plans differences Email Plan Guide Purchasing & renewing a package Auto top-up feature Switching between different plans Unused package credits Using a discount coupon Refunds
Understanding domain statuses: Verified, Processing, Unverified Managing sending domains Why DNS records matter for email deliverability Adding & verifying DNS records (SPF, DKIM, DMARC) Checking & resolving domain blacklist issues Managing sender email addresses Sender address requirements and best practices What to do if a sender address is in use by active campaigns Understanding shared vs. dedicated IP addresses Connecting or disconnecting a domain to/from an IP address Buying & managing dedicated IP addresses
User roles & statuses User status explained: active and deleted users How to add a new user: user invitations and registration Managing user permissions and access rights Default permissions for additional users Deleting users Transferring admin rights to another user What happens after admin rights are transferred? What happens when permissions are disabled for a user?
Adding & editing contacts Technical Requirements for Your Contact List Fields Adjusting contact list settings Managing contact groups Creating & managing segments Creating & managing groups Managing contact attributes
How to create your first email campaign Campaign card overview: General, Contacts, Email template, Scheduler Naming and renaming campaigns Understanding campaign statuses: Waiting, In progress, Paused, Finished Saving progress and navigating between campaign blocks How to set up the sender email address and name Managing reply-to addresses in campaigns Selecting and managing IP addresses for sending How to select recipients: Contacts, Groups, Segments Excluding contacts and groups from a campaign Understanding contact limits and subscription packages What to do if you exceed your email sending limit Validating contacts before sending: Email Checker explained Choosing and editing email templates for campaigns Uploading custom HTML Writing effective subjects and preheaders Adding and managing UTM parameters Scheduling campaigns: send now or later Setting up delivery dates, times, and days of the week How to calculate and adjust sending volume over time Managing dedicated IP expiration and renewal How to preview and test your campaign Managing and editing your test email group Using the campaign calendar: viewing, filtering, and creating campaigns Understanding campaign statuses: Active, Scheduled, Completed Viewing campaign details and quick actions from the calendar Navigating the campaign list: columns and filters Searching and filtering campaigns by name, date, and status Campaign card: overview, timeline, and audience How to pause, continue, or delete a campaign Understanding campaign statuses: Planned, Active, Paused, Finished Campaign performance & analytics Using heatmaps to analyze email engagement
General email performance Comparing campaign variants Ratings and trends Comparing your results with Industry benchmarks Comparing your results with Industry benchmarks Monitoring your email marketing performance
What is Sendigram Email Builder How to create a new template How to manage your templates list Template Tags
Automations Creating a New Automation Understanding Automation Templates Managing Your Automations List Automation Builder: Overview and Navigation Setting Up Automation Details (Name, Description, Tags) Working with Triggers Working with Actions Managing Elements in the Workflow Canvas Running and Pausing Automations Automation Settings Panel Managing Emails and Templates Inside Automations Contact Management Inside Automations

Validating contacts before sending: Email Checker explained

A clean, verified contact list is essential for high deliverability. Sending to invalid or risky addresses increases bounces, damages your domain reputation, and can land your emails in spam. To help prevent this, Sendigram provides the built-in Email Checker.

1. What Is the Email Checker?

  • The Email Checker is a validation tool that scans your contact lists.
  • It identifies invalid, misspelled, inactive, or disposable addresses.
  • It reduces bounce rates and protects your sender reputation.

2. When to Use It

  • Before sending a new campaign – check the list to avoid sending to bad addresses.
  • After importing contacts – validate new uploads before adding them to live campaigns.
  • Periodically – run checks on older lists to keep them fresh.

3. How to Validate Contacts with Email Checker

  1. Go to Contacts → Lists.
  2. Select the list you want to check.
  3. Click Validate with Email Checker.
  4. The tool will analyze each email and categorize them as:
    • ✅ Valid – safe to send.
    • ⚠️ Risky – may bounce or be inactive.
    • ❌ Invalid – should be removed.
  5. Review the results and decide whether to keep, suppress, or delete risky/invalid contacts.

4. Benefits of Using the Email Checker

  • Improves deliverability – fewer bounces mean more inbox placement.
  • Protects your domain reputation – ISPs trust verified senders.
  • Saves money – don't waste email quota on undeliverable addresses.
  • Boosts engagement – clean lists mean more active, real subscribers.

5. Best Practices

  • Always validate imported contacts before their first campaign.
  • Regularly validate older lists (every 3–6 months).
  • Suppress or delete invalid addresses immediately.
  • Use risky addresses cautiously — consider segmenting them separately.

6. Compliance Note

  • Validating contacts does not override opt-in requirements.
  • Always collect emails with consent to remain GDPR and CAN-SPAM compliant.

Tip: Think of Email Checker as your spam filter shield — it keeps your lists clean and helps every campaign perform better.

Still have questions?
Contact Us