Email Validation & Hygiene Solutions

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

Undeliverable and harmful addresses can lead to blocking and blacklisting by ISPs. Even something as innocent as a typo on a registration form can mean a lost opportunity to connect with a valuable customer. Use SafeToSend to eliminate these threats.

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Clean - Email Validation Solutions

Unlike services that merely validate or verify addresses

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

Check - Email Validation


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

Correct - Email Validation


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

Protect - Email Validation


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

SafeToSend Is Integrated with Your Favorite Marketing Platforms


Email Validation Service Options

Correct hygiene errors, avoid blacklists, and increase deliverability by removing bouncing email addresses, disposable domains, and toxic-but-deliverable spamtraps and honeypots with SafeToSend.

Managed Email Validation

Email Validation

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Batch Email Validation

Email Validation

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Real-Time Email Validation

Email Validation

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How It Works:

Here’s how SafeToSend corrects complex errors and protects 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 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 account 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.

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