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  1. To validate a list of email addresses, you can1:
    1. Create a new column next to the column that contains the email addresses you want to validate.
    2. In the first cell of the new column, enter the following formula: =IF (ISERROR (FIND (""@"",A1)),""Invalid"",""Valid"")
    3. Copy the formula down to the rest of the cells in the new column.
    Alternatively, you can verify email lists by performing an email syntax check, getting rid of throwaway and catch-all emails, checking the domain name, pinging the mail server, and keeping up with list changes2.
    Learn more:
    • Create a new column next to the column that contains the email addresses you want to validate.
    • In the first cell of the new column, enter the following formula: =IF (ISERROR (FIND (""@"",A1)),""Invalid"",""Valid"")
    www.emaillistvalidation.com/blog/email-address-va…

    How to Verify Email Lists?

    • 1. Perform an Email Syntax Check All mail addresses share the same format: username, followed by the @ symbol, followed by the domain. ...
    clean.email/verifier/how-to-verify-email-list
     
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