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How to Make Sure the Email Address You Are Sending Mail to Is Correct & Valid

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    • 1). Check the syntax of the email address. There should be one "at" symbol and one period after that symbol. For example, abcd@efg.com is a valid syntax.

    • 2). Validate the domain. The email above is only valid if "efg.com" exists in the physical world as a computer or network of computers ready to receive the email message and pass it to the user you specified before the "at" symbol.

    • 3). Contact the domain mail server and verify that the user exists. This involves using Standard Mail Transfer Protocol (SMTP). You don't need to know the first thing about SMTP because there are websites that let you enter a few email addresses and verify the user with the push of a button.

    • 4). Buy software to test email addresses if you have a large number to examine.

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