The ELV Blog

Field notes on deliverability.

Hard-won lessons on email verification, inbox placement, and keeping your sender reputation spotless — from the team behind Email List Validation, trusted by 80,000+ users.

Email verification services and tools for marketers

Best Ways to Capture Emails from Marketplace Buyers with Package Inserts

Boost your email list with proven package insert strategies. Use QR codes, offers, and real-time verification to convert marketplace buyers—without.

Read article →

List validation integrations with ESPs and CRMs

How to Reduce Marketo Database Size and Pricing by Deleting Junk Leads

Clean your Marketo database by removing invalid, role, and disposable emails. Use email verification to cut bounce rates, save money, and improve.

List validation integrations with ESPs and CRMs

How to Suppress Unengaged People from Customer.io Campaigns Automatically

Automatically exclude inactive subscribers from Customer.io campaigns using email verification.

Email authentication and encryption: SPF, DKIM, DMARC, TLS

Reverse DNS and PTR Records for Sending IPs in 2026

Ensure your sending IPs pass reverse DNS and PTR checks. Learn how PTR mismatches hurt deliverability and how to fix them with real-time email.

Bulk email list validation

How to Suppress Exit Intent Popups for Verified Subscribers

Stop frustrating verified subscribers with exit intent popups. Learn how email verification enables precise suppression and improves engagement without.

Email marketing compliance: GDPR, CAN-SPAM, consent and unsubscribes

How to Remove Non-Consented Contacts During List Cleaning

Learn how to identify and remove non-consented contacts from your email list using real-time verification and deliverability testing—improve compliance.

Deliverability, blocklists and sender reputation for marketers

Bulk Correcting Hotmail and Yahooo Domains in an Old List

Clean up old email lists with bulk correction of common typos like Hotmail and Yahooo. Use real-time verification to fix misspelled domains in CSV and.

List validation integrations with ESPs and CRMs

Marketing vs Non-Marketing Contacts in HubSpot After Migration

Fix misclassified contacts in HubSpot after migration. Learn how to set non-marketing contacts and improve list hygiene with email verification.

Bulk email list validation

Using Email Delivery of the Asset to Verify the Address Works

Confirm email addresses before download using real delivery checks. Reduce bounces, improve inbox placement, and verify validity with precision — no.

Engagement, segmentation and campaign benchmarks

How Many Days Apart Should Re-Engagement Emails Be Sent?

Discover the optimal days between re-engagement emails to win back inactive subscribers. Boost deliverability and engagement with data-backed spacing.

Email list cleaning and scrubbing: spam traps, catch-alls, disposables and dead addresses

Clean Waitlist Emails Before Product Launch Announcement

Remove fake signups and invalid emails from your waitlist before launch to boost engagement and deliverability.

Email verification services and tools for marketers

AI Subject Line Optimization vs Manual A/B Testing in 2026

Compare AI subject line optimization and manual A/B testing for higher open rates. See how real-time verification and inbox placement testing improve.

Stay sharp

Get deliverability tips in your inbox.

Occasional, practical notes on verification and inbox placement. No spam — we'd be embarrassed.