Sidemail

Sidemail

Email delivery made simple for startups

411 followers

Sidemail is an all-in-one email delivery platform for startups. It covers everything for delivering and managing emails – email API, transactional emails, email marketing, email automation, contact profiles management, email templates, and subscribe forms. Developers and business owners appreciate the most is its easy integration, intuitive UI, and amazing customer care. Sidemail is based in the EU.
This is the 4th launch from Sidemail. View more

Sidemail Validator

Launching today
Free email address validator (inc. SMTP deep check)
Free, fast, no-login email validity checker. Paste an email address, and we’ll check syntax, domain & MX records, flag disposable providers and typos, and optionally run a safe SMTP deep check without sending email. You can copy the results and validate more addresses in seconds.
Sidemail Validator gallery image
Sidemail Validator gallery image
Sidemail Validator gallery image
Free
Launch tags:EmailMarketingSaaS
Launch Team
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Wispr Flow: Dictation That Works Everywhere
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What do you think? …

Kristyna Vrbova

Hi Hunters!

I'm Kristyna, maker of Sidemail. I'm happy to share with you what we've been building.

If you're sending marketing or ad emails, you'll love this.

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.

We made a free, no-signup, in-browser checker you can use fast.

Upload a CSV with the email addresses you want to validate, and it performs checks:
- Syntax – Confirms correct proper email format (name@domain).
- Domain & DNS – Verifies the domain exists and resolves.
- MX records – Verifies the domain can receive mail.
- SMTP handshake (optional) – Checks the mail server accepts the recipient.
- Disposable domains – Flags temporary inbox providers that can hurt deliverability lists.
- Common typos – Catches mistakes and suggests fixes.

Want to verify a whole list? Try our Email list validation tool – https://sidemail.io/tools/email-...

If you have any questions or thoughts to share, please do tell.

Thank you!
Kristyna 💙

Patrik Krupar

@k_vrbova amazing work team!