{"id":12872,"date":"2020-07-24T09:31:29","date_gmt":"2020-07-24T09:31:29","guid":{"rendered":"https:\/\/www.gmass.co\/blog\/?p=12872"},"modified":"2023-02-08T17:33:31","modified_gmt":"2023-02-08T17:33:31","slug":"email-verification-service","status":"publish","type":"post","link":"https:\/\/www.gmass.co\/blog\/email-verification-service\/","title":{"rendered":"Our new free email verification service [with API]"},"content":{"rendered":"

We are now offering a free email verification service<\/strong>. You can verify your email addresses while sending<\/strong>, or separately from sending<\/strong>. If you verify your email addresses while sending, you can substantially minimize the bounces<\/strong> you get back to your Inbox<\/strong> since only email addresses that pass verification will receive your email campaign. We also provide a web-based email verifier<\/a> to verify your addresses, and we can also update your Google Sheet<\/strong> with a “VERIFIED” column showing a PASS<\/strong> or FAIL<\/strong> status for each address. Finally, you can use our API<\/strong> to integrate our email validator into your own software.<\/p>\n

So, if you’re used to using a third-party email verification service like NeverBounce<\/strong> or ZeroBounce<\/strong>, you can stop doing that because our tool is free<\/strong>, accurate<\/strong>, and much easier to use<\/strong>.<\/p>\n

What is email verification?<\/h2>\n

Email verification tests whether an email address is a valid email address<\/strong> or not. We do that by running two algorithms on it:<\/p>\n

    \n
  1. A syntax checking algorithm<\/strong> to make sure the email appears valid. For example, ajay@gmail would not pass this step, but ajay@gmail.com would pass this step.<\/li>\n
  2. A mail server check<\/strong> to ensure that the receiving server for the address will accept email for that particular address. This is done by creating an SMTP session to the remote server and issuing a series of SMTP commands, specifically the RCPT TO<\/strong> command, to “ask” the server if the address is valid.<\/li>\n<\/ol>\n

    Who should verify before sending emails?<\/h2>\n

    Not everyone needs to be concerned with email verification. If you’re sending an email newsletter to members of your tennis club, and you know each of them personally, you likely don’t need to verify. If, however, you’re a salesperson scraping LinkedIn<\/strong> for leads and building a cold email<\/a> list, then verifying addresses will benefit you.<\/p>\n

    How do you use the free email verification service?<\/h2>\n

    There are three ways<\/strong> to use the email verification service: the web-based email verifier<\/a> and inside GMass.<\/p>\n

    If you’re not a GMass user or you just want to use the standalone email verification service<\/strong>, head over to the web-based email verifier<\/a>. If you want to have GMass verify all of your email addresses before sending a campaign, then just check the Verify<\/strong> box in your settings. Finally, you can use our API<\/strong> to provide email verification services inside your own app.<\/p>\n

    Option 1: While using GMass<\/h3>\n

    To verify your addresses at the time you send your campaign, all you have to do is check the Verify<\/strong> box:<\/p>\n

    \"\"<\/a>
    Just check the “Verify” box and all of your email addresses will be verified before sending.<\/em><\/figcaption><\/figure>\n

    Checking this box will verify each address before a message is sent<\/strong> to that address. The address must NOT FAIL verification<\/strong> for GMass to send your email to it. This is different than requiring an address to PASS verification<\/em>. By sending to all addresses that don’t fail verification<\/em>, the verifier is erring on the side of caution to ensure that as many of your emails get sent. Otherwise, if the verifier required verification to PASS, there’s the risk of reducing the reach of your campaign because of false negatives.<\/p>\n

    If the address fails verification<\/strong>, GMass will skip sending to it,<\/strong> add it to your account’s Bounce list<\/strong>\u00a0and will log it<\/strong> for your reports. Having verification ON<\/strong> substantially reduces the bounce-backs you get<\/strong> after your mailing since GMass is sending only to valid addresses. What counts as a verification fail?<\/em> One of the conditions must be true for an address to fail verification:<\/p>\n

      \n
    1. The address is malformed<\/strong>. For example, ajay@gmail is not a valid email address.<\/li>\n
    2. There is no registered MX server<\/strong> for the domain, meaning the domain can’t receive email.<\/li>\n
    3. The response from the mail server<\/strong> definitely indicates that the email address is invalid. For example, “User not found” is a definitive message from the mail server indicating that the address is bad.<\/li>\n<\/ol>\n

      Therefore, one of the above conditions must be met for GMass to skip sending to that address and add it to your bounce list.<\/p>\n

      If the mail server responds with a message indicating the mailbox is full<\/strong>, GMass will skip sending to it<\/strong>, but will not add the address to your Bounce list<\/strong>, since the address is still valid<\/strong> and the user might empty the mailbox at some point<\/strong>, therefore making it able to receive your future messages.<\/p>\n

      If any other condition is met, then GMass considers it a verification PASS<\/strong> and will send your message to that address.<\/p>\n

      Option 2: Web-based email verifier<\/h3>\n

      You can also verify your addresses separately, outside of the sending process, using our free web-based email extractor and verifier<\/a>. Just paste your addresses in any format and hit the Extract<\/strong> button, and then after the addresses are extracted, you can hit the next button to VERIFY<\/strong> them.<\/p>\n

      \"\"<\/a><\/p>\n

      This tool currently has a limit<\/strong> of verifying 5,000 addresses per hour<\/strong>.<\/p>\n

      The verifier tests each address and lists the verification status as one of the following:<\/p>\n