How do Advanced Email Validation Web Services Work: How Do They Compare to Standard Validation?

Nov. 4, 2010 - PRLog -- The primary function of any email address validator (EAV) is to weed-out bad email addresses, yet a majority of bad email addresses pass using standard JavaScript email address validation scripts. Standard email address validation uses client-side JavaScript to perform rudimentary tests that let a lot of bogus email addresses pass unnoticed. Not so with advanced email address validation Web services.

Standard email address validation, using basic client-side validation JavaScript, only checks the sytax of an email address. It assures that an email address contains a box name, an @-symbol, a domain name and a minimum character count. Given standard email validation testing, a bogus email address, like test@test.me, will pass validity testing 99.99% of the time.

An Advanced email address validation Web service offers a significantly more thorough approach. It instantly weeds-out invalid email addresses using sophisticated algorithms and dozens of rules and tests. It acts like x-ray vision for email addresses, seeing beyond basic syntax to identify shortcomings in the address that are not apparent to the naked eye.
There are six things every email validation system should do to ensure an email address is valid:

  1. Check email address syntax
  2. Verify that individual domain-specific mailbox rules are met
  3. Check for improbable names (vulgar, famous, bogus, or suspicious keystroke sequences)
  4. Check mail exchange record of domain is valid and accepting mail
  5. Check existence of SMTP server for domain
  6. Check existence of working mailbox, if possible

Because standard email address validation only checks for syntax regularity, it will incorrectly pass email addresses in the majority or typical scenarios in which the address should have failed, such as: non-existent domain (bob@yyyhoo.com), noncompliance with domain name rules (111bob@gmail.com), vulgar words in email name (damn@aol.com), non-existent mailbox (vhujikmokoko@gmail.com), non-existent SMTP server (bob@msn.net) or an intentionally bogus email, created with the name of a character or suspicious keystroke sequencing.

How an advanced email address validation Web service works: Like standard email address validation, an advanced Web service checks for syntax regularity; however, it surpasses standard JavaScript validators, using artificial intelligence, multiple tests, and complex algorithms to identify unlikely email addresses. It uses real-time network signaling to query a remote mail server by attempting to send a micro-message to verify that an email message can be delivered, without actually sending a message.

Specifically, tests performed on the mail server include: Does the server exist? Does it answer? Does it answer in a timely fashion? Is it intelligent? Does it respond to basic commands? Does it have a directory of users? Does it recognize the email box for which we are testing? Will it accept mail for this address? All in all there are over 35 different tests that are performed on the mail server in the attempt to validate an email address.

Simultaneously, email address legitimacy is tested: Does the email address contain vulgar words? Does the domain match the mail box name? Is the email address known as disposable? Essentially, is this email address bogus?

Email validation can be simple or sophisticated: Standard email validation assures that emails are correctly formatted while an advanced email validation Web service does that, plus exploits the latest Internet technology to help weed out bad, invalid and bogus email addresses at the point of entry.

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About Service Objects: Service Objects offers state-of-the-art, real-time Web services, including an advanced email validation service: DOTS Email ValidationSM instantly verifies whether or not an email address is bogus or real, based on the latest Internet technology available.

Free sample code and a 15-day XML trial key are available for downloading from Service Objects' website -----www.serviceobjects.com/products/email-validation -----

Batch processing is also available.