Real-Time SMTP Verification
SMTP verification simulates sending an email without actually delivering it, connecting directly to mail servers to confirm mailbox existence and deliverability with maximum accuracy.
Clean your email lists efficiently with our professional bulk email validator that checks thousands of addresses in minutes. Get accurate validation results at just $0.0036 per email to improve your campaign deliverability and protect your sender reputation.
$0.0036 per email
Your free $5 credit covers 1,388 validations
Sending emails to invalid email addresses increases bounce rate and thereby damages your sender reputation. Bulk email validation is the process of verifying large lists of email addresses to ensure they are valid, active, and capable of receiving messages before you send your campaigns.
Email validation checks whether an email address is correctly formatted and appears to follow the syntax rules. Email verification goes a step further by checking whether the email address is deliverable-that is, whether it can receive messages. A verifier typically connects to the mail server and simulates sending an email to confirm that the mailbox is active.
Our bulk email validator performs over 20 validation checks on every address, including syntax validation, domain verification, MX record checks, SMTP connection tests, and detection of disposable or temporary email addresses. This comprehensive approach ensures your email list contains only legitimate, deliverable addresses.
SMTP verification simulates sending an email without actually delivering it, connecting directly to mail servers to confirm mailbox existence and deliverability with maximum accuracy.
MX records are used to indicate to which mail server to connect to reach the mailboxes hosted on a domain. We verify these records to ensure the domain can receive emails.
A disposable or fake email looks like a real email address. Unfortunately, it is a throwaway address that is used once or twice and never again. We identify and flag these temporary addresses.
Process thousands of emails simultaneously with our high-speed validation engine. Upload your entire list and receive comprehensive results in minutes, not hours.
Our bulk email validator performs multiple verification stages to ensure the highest accuracy. Each email address goes through these critical checks:
Syntax checking is a necessary first filter to catch typos and malformed addresses before doing deeper checks. Modern validators handle this for you. Just don't rely on syntax validation alone – it's just step 1. We verify proper email format according to RFC standards.
You can use a DNS lookup to see if the domain exists and has MX records (Mail Exchange records) – these tell you if the domain has a mail server set up to receive email. Invalid domains are immediately flagged.
If a domain has no MX record (and no fallback mail server via an A record), any email to it will go nowhere and hard-bounce. We verify mail exchange records to confirm email delivery capability.
SMTP (Simple Mail Transfer Protocol) is the protocol through which emails are sent between servers. Mailbox verification via SMTP goes further than DNS, it is the closest you can get to actually sending an email without sending one.
A DEA (disposable email address) is a temporary, throwaway email that expires after a short period. DEA providers let users create quick, short-lived inboxes-often lasting about 10 minutes. We maintain an updated database of disposable providers.
Identifies generic role-based addresses like info@, support@, sales@, and admin@ that often have lower engagement rates and may not reach individual recipients.
Our tool checks if the server has a accept-all policy that accepts any email address sent to that domain. These domains return valid for all emails, making verification more challenging.
Each email receives a quality score based on all validation checks combined, helping you prioritize your highest-value contacts and make informed decisions about risky addresses.
Sending emails to invalid email addresses can lead to a high bounce rate which can negatively impact your sender reputation. Frequent bounces signal to ISPs that you might be sending unsolicited or low-quality emails resulting in your future emails being marked as spam or even blocked.
Bounce rate refers to the percentage of emails that are not delivered successfully to the recipient's inbox. A high bounce rate can negatively impact your sender reputation and email deliverability. Bounce rates higher than 2% can automatically alert ISPs (Internet Service Providers) and cause them to reject your emails or deliver them to spam.
Every email you send takes time or money. By verifying addresses ahead of time, you filter out invalid ones, ensuring you only invest resources in real recipients. Stop wasting budget on emails that will never reach their destination.
Verification tools flag spam traps, honeypots, personal accounts, and other risky addresses that can damage your reputation or trigger blocking, helping you avoid being added to blocklists. Spam traps and hard bounces kill your reputation. Get rid of them so your emails don't end up in spam folders anymore.
Get started with 1,388 free validations. Verify your emails in minutes.
Start Now - $5 Free CreditSee exactly what information you'll receive for each email address. Our validator returns detailed status, deliverability scores, and actionable insights.
| Email Address | Status | Quality Score |
|---|---|---|
| [email protected] | Valid | High (95%) |
| [email protected] | Valid | Medium (78%) |
| [email protected] | Invalid | Low (0%) |
| [email protected] | Valid | High (92%) |
| [email protected] | Disposable | Risky (15%) |
| [email protected] | Invalid | Low (0%) |
To maintain a positive sender reputation and avoid high bounce rates, it's crucial to bulk verify your email list before sending out campaigns. Clean your subscriber lists to improve deliverability rates and maximize open rates.
Validate purchased or scraped email lists to ensure you're only targeting real, active email addresses. Remove invalid contacts before your sales team wastes time on dead leads.
30% of emails go bad annually, so regularly clean existing customer databases to maintain data quality, improve engagement metrics, and reduce email marketing costs by removing inactive addresses.
Implement real-time validation during signup processes to prevent fake accounts, disposable emails, and typos at the point of entry, ensuring only quality users enter your database.
Upload your email lists in any of these formats for instant bulk validation:
.csv
Standard comma-separated values format. Perfect for exports from most email marketing platforms and CRMs.
.txt
Plain text files with one email address per line. Simple and straightforward for quick validations.