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Understand your email
Check address syntax and receiving mail servers. Find issues before sending an important message.
Start a checkFree diagnostics
Analysis starts automatically upon receipt. Each address accepts one message.
We check syntax and mail-domain DNS. Mailbox existence requires a separate confirmation message.
Checks that help
The email validator helps find address-format errors and checks whether the domain is configured to receive mail. Start here if a message bounces, a contact was entered manually or an address looks questionable.
Copy the recipient’s complete address, such as name@example.com.
See whether the address format is valid and receiving mail servers can be found.
If an issue is found, confirm the address with the recipient before sending again.
Your archive
Reports are saved for 24 hours.
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The bigger picture
The address, server and message affect different stages of delivery. Check the parts that matter to your task.
Questions and answers
No. The validator does not send email or request access to the mailbox.
The mailbox may not exist, may be full or may reject messages. Confirm the address and read the bounce reason. For your own domain, also run an SMTP check.
The service currently checks one address at a time. Change the input and start a new check for the next address.
Your report is available in your history for 24 hours. You can delete it earlier if you wish.
Address errors cause bounces and lost customer communication. The validator checks email structure and mail settings for the domain, the part after @. If the domain is not set up to receive email, confirm the contact. Valid formatting does not rule out a typo in the mailbox name: similar addresses may belong to different people.
Check an address after manual entry, before an important customer reply or while investigating a bounce. A successful result confirms the checked format and mail settings; it does not prove that the mailbox exists or that its owner consented to a campaign. Use a confirmation link from your own system to verify an address. This validator does not send mail to the recipient.