Email Validation Service

Email Verification, Correction & Hygiene

Undeliverable and harmful addresses can lead to ISP blocking and 3rd party blocklisting. Even something as innocent as a typo on a registration form can mean a lost opportunity to connect with a valuable customer. Use our SafeToSend email validation service to clean your email list and eliminate these threats.

Bouncing emails, spamtrap hits, stale lists, and damaged sender reputations – just a few of the reasons to utilize our SafeToSend® email validation service.

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Clean - Email Validation Solutions

Unlike services that merely validate or verify addresses

SafeToSend ensures flawless email list hygiene with a robust three-step screening process.

Check Step of Email Validation Service


Verify each address in real time to confirm that it’s valid and can accept mail.

Correct Step of Email Validation Service


Our patented spell-check technology corrects as many as seven errors in a single address and fixes any typos in your file.

Protect Step of Email Validation Service


We check each email address to identify and flag spamtraps and other damaging email addresses.

The payoff of SafeToSend is substantial: 100% guaranteed safe, deliverable email addresses that drive higher response rates, conversions, and profits. Learn more about the process. 

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SafeToSend Is Integrated with Your Favorite Marketing Platforms

SafeToSend® service ensures flawless list hygiene with a robust three-step screening process

Email Validation Service Options

Correct typos, avoid blocklists, and improve email deliverability by removing bouncing email addresses, disposable domains, and toxic-but-deliverable spam traps and honeypots.


Managed Email Validation

Email Validation

Clean your email list using the expert knowledge of the most experienced and dedicated team in the industry.

Managed Service is perfect for:

  • Projects that require the insight of a dedicated project manager and expert data engineers
  • One-time runs and projects with special requirements

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Batch Email Validation

Email Validation

Fast & easy cleaning for frequent projects. Clean your email lists 24/7. Perform routine data cleanup in a matter of hours.

Automated Batch Processing is perfect for:

  • Cleaning new emails you collect
  • Preparing email lists for new campaigns
  • Routine cleanup of existing data

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Real-Time Email Validation

Email Validation

Detect problematic addresses and correct registration errors in milliseconds. Perfect for CRM & POS systems and online forms.

Real-Time is perfect for:

  • CRM and POS systems
  • Client-side integrations
  • Web-based forms

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How Our Email Validation Process Works:

Here’s how we correct complex errors and protect your file from toxic addresses.

Step 1: CHECK

Email Validation Check

To make sure it’s deliverable, we:

  • Determine whether the address syntax conforms to RFC (822, 2822, 5322, 3696, 5233, 6530) and FreshAddress standards.
  • Check each email address in real time to confirm that the upper and lower domains and associated MX (mail exchanger) records are valid and can accept mail.
  • Ensure address meets ISP-specific requirements.
  • Verify the email address is linked to an actual working mailbox. (Our proprietary algorithm for this process includes a vast database of recent email deliverability findings and a real-time SMTP check.)


Email Validation Correction

To maximize the number of safe, deliverable addresses on your list:

  • Our patented spell-check technology corrects as many as seven errors in a single address and fixes any typos, including:
    • Misplaced or transposed @ signs and invalid characters such as spaces or quotes.
    • Typos in both TLD’s (.com, .net, .edu, etc.) and LLD’s (gmail, aol, Hotmail, etc.)
    • ANY misspelled domain, not just the most popular ones.
  • Our proprietary algorithm will also suggest alternative domains for uncommon entries (such as instead of
  • Every corrected email addresses included in your file is 100% guaranteed to be valid and deliverable.


Email Validation Protection

We check each email address against our vast knowledgebase to identify and flag for removal any damaging (but deliverable) email addresses, including:

  • Toxic: Spamtraps and honeypots.
  • Undesirable: Frequent complainers, role accounts, disposable domains, fictitious and malicious email addresses, client-specific suppressions.
  • Not best-practice: DMA “Do Not Email List” and FCC wireless domains.


B2B Email Validation & Verification

Are you a B2B marketer that relies on email to open doors and drive revenue?

If so, your success hinges on your ability to ensure that every email address in your database is safe, deliverable, and belongs to a real person. Poor data quality will result in bouncing emails, spamtraps, and other bad addresses, which can derail your entire email marketing program.

Are you a B2B data provider that sells email data to your customers?

If so, then your product is only as good as the data that you’re providing. Poor data quality will result in your customers paying you for bouncing emails, spam traps, and invalid records – all of which will derail their marketing programs. Probably NOT what they were looking for when they decided to give you their business.

SafeToSend is the only solution than can neutralize these threats and validate email addresses at catch-all and other non-pingable domains, which can comprise 50% or more of a typical B2B database. It’s the key to improving your business and differentiating it from your competition.

The Problem

Many businesses use catch-all email servers that accept mail sent to any address at their domain, even if the person and mailbox don’t exist. Catch-all domains always return a valid response when you perform an SMTP check.

Without SafeToSend, it’s impossible to know whether the email address you’re sending to belongs to your intended target or could possibly be a spam trap.

The Solution

FreshAddress has developed technology that enables us to validate good and bad email addresses at B2B domains hosted by Office 365 and GSuite.

This allows us to pierce through the catch-all domains at these providers. As a result, we can determine if an address is deliverable and belongs to a real person, versus being a possible trap. No other vendor can provide this level of sophistication.

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