The ListEmailCheck Blog
Free guides on cleaning email lists, reducing bounce rates, improving deliverability, and getting more replies from cold outreach.
How to Remove Duplicate Email Addresses from Your List for Free
The same person getting your email three times per campaign is not a good look. Here are four free methods to deduplicate your list in minutes.
What Is an MX Record? Why It Matters for Email Deliverability
No MX record means no email delivery — period. Here's everything you need to know about MX records, how they work, and how to check yours for free.
Email Warm-Up: What It Is and How to Do It Correctly
Sending 1,000 emails from a new domain on day one is a fast path to the spam folder. Here's the week-by-week warm-up schedule top senders use to build a clean reputation.
How to Check If an Email Address Exists Without Sending an Email
You can confirm whether a mailbox is real before sending a single email. Here's exactly how SMTP verification works and the free tools that do it for you.
Role-Based Email Addresses: Should You Remove Them from Your List?
info@, support@, and contact@ addresses don't belong to a person — they belong to whoever's on duty. Here's why they hurt your deliverability and what to do with them.
What Is Email List Decay and How to Stop It
A list you built a year ago is already 20% degraded. Here's what email list decay is, why it happens, and the practical steps to slow it before it damages your deliverability.
How to Reduce Email Spam Complaints (Below the 0.1% Threshold)
50 spam complaints from a 50,000-person list is enough to trigger Gmail filtering. Here's how to reduce your complaint rate and stay well below the threshold.
Email Bounce Rate Benchmarks: What's Acceptable in 2026?
A 2% hard bounce rate can get your ESP account suspended. Here's what acceptable bounce rates look like by industry and email type — and how to stay well under the limit.
How to Run a Re-Engagement Email Campaign and Save Inactive Subscribers
Dormant subscribers drag down your open rates and sender reputation. Here's the 3-email sequence top email marketers use to win them back — or let them go cleanly.
Ready to put it into practice?
Verify and clean your email list for free — 100 verifications/day, bulk CSV upload, disposable email detection. No credit card required.
Start Free — No Card Needed