The VerifyFlow Blog

Plain-English guides to cleaning your mailing list, cutting bounces and getting your emails into real inboxes.

2 min read

How to Verify a Large Email List (Up to 1 Million Addresses) Without a Subscription

Got a huge mailing list and no appetite for another monthly bill? Here's how bulk email verification works, and how VerifyFlow checks up to 1,000,000 addresses for one flat £20.

2 min read

How to Verify Emails in an Excel or CSV File: A Step-by-Step Guide

Your mailing list probably already lives in a spreadsheet. Here's a simple, step-by-step way to verify emails in an Excel or CSV file without extra software.

2 min read

How to Remove Invalid Emails From Your Mailchimp List Before Your Next Campaign

Sending to dead email addresses wastes effort and can hurt delivery. Here's how to remove invalid emails from your Mailchimp list before you hit send.

2 min read

How to Fix a High Bounce Rate: 7 Steps to Take Before Your Next Send

A high bounce rate means too many of your emails are hitting dead ends. Here are seven practical steps to fix it before your next send.

2 min read

How to Clean an Old Email List Before Re-engaging Subscribers

Dusting off an old mailing list can be a quick win, or a quick way to hurt your delivery. Here's how to clean it first and re-engage subscribers properly.

2 min read

How to Find Out Why an Email Bounced (and What to Do About It)

Got a "message not delivered" notice and not sure why? Here's how to read it, the most common causes, and what to do next.

2 min read

Why Are My Emails Going to Spam? 8 Common Causes and How to Fix Them

If your emails keep landing in the spam folder, the cause is usually fixable. Here are eight common reasons and what to do about each one.

2 min read

How to Reduce Your Mailchimp Bill by Cleaning Your Mailing List

Many email tools charge by the number of contacts you store. If part of your list can't receive anything, you may be paying for nothing. Here's how to trim it.

2 min read

What Is a Good Email Bounce Rate? And How to Lower Yours

Not sure whether your campaign numbers are fine or a warning sign? Here's what counts as a good email bounce rate and how to bring yours down.

2 min read

Hard Bounce vs Soft Bounce: What's the Difference and What to Do About Each

Your email report shows two kinds of bounce, and they need different handling. Here's what each one means and exactly what to do.

2 min read

How to Check if an Email Address Exists Without Sending an Email

Need to know if an address is real before you send? Here are quick manual checks, why they fall short, and how to check a whole list at once.

Last updated 12 October 2026