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5 Comments

Spend $0 to clean your email list 💌

Hi!

If you're sending marketing or cold emails, you will love this email validator – https://sidemail.io/tools/email-validator/

Nothing ruins a campaign like poor deliverability. Bad email addresses drive up bounces, hurt your sender reputation, and lower open/reply rates.

Email validator is what helps you avoid this.

But most of the tools like this hide behind signups and paywalls.

I wanted a no-signup, in-browser checker you can use fast. So I built it, and you can use it too.

It’s free and online.

posted to Icon for group Growth
Growth
on October 20, 2025
  1. 1

    Tried it earlier today, and it actually works really fast. Most email checkers make you sign up or limit the free checks, so this one's pretty handy when you just need to clean a quick list. Nice work.

  2. 1

    A clean list is the absolute foundation. Once its clean the next move is sending personalized messages at scale to actually book meetings. We've used this to help a web design agency get 10 new clients in just 3 months.

    Happy to go for a partnership here :)

    1. 1

      Yes, exactly!

      It's great! Are you somehow automating the process or sending the emails manually?

      1. 1

        we are automating the process. Only parts of of the copy, optimizing & monitoring is made by a human :)

  3. 1

    Do you have any other tips to increase the chances of getting the emails opened? I'm all ears!

    And if you have any ideas or questions regarding the validator tool, please do tell :)

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