How to Test if an Email Address Is Valid

Written by lorenzo von matterhorn
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How to Test if an Email Address Is Valid
Check the validity of someone's e-mail address. (E-mail Concept image by wayne ruston from

E-mail addresses can be difficult to remember and easy to type wrong, so it is often important to know whether or not the email address you are sending an e-mail to is valid. If it is invalid, no one will ever receive the message. Luckily, it's easy to determine whether an e-mail address is valid and active.

Skill level:


  1. 1

    When you meet someone, they may give you their e-mail address. If it is on a business card, you can be confident that the address is valid. If the person, or your, writes down the address, try and double-check that the address is written correctly and no letters were misheard.

  2. 2

    Sit down at your computer and compose an e-mail. Enter the person's e-mail address in the "Send to" box.

  3. 3

    Click "Sent" on the email. You should know quickly whether or not the address is valid. If it is not valid, you will receive an e-mail within a few minutes saying that your message has bounced back because the e-mail address you used was invalid. You may also get an e-mail saying the recipient's e-mail inbox was full, so the message couldn't be delivered. If the inbox is full, the address is valid, but until he or she deletes some e-mails, no mail will get through to them.

  4. 4

    Double-check the address you typed in to make sure it matches the address you wrote down if the email comes back as invalid. If you typed everything in perfectly, try to find her on Facebook, where sometimes people allow their e-mail address to be public.

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