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  1. Service Objects
  2. Products
  3. Email Validation - Global
    • Does Service Objects' Email Validation service detect TLS?
    • Does Email Validation work with Salesforce, Marketo, and other marketing and sales platforms?
    • What is email blacklisting?
    • Why did I get a different result for the same email address?
    • Can I buy a list of email addresses from you?
    • Does Email Validation send an email to the email address being verified?
    • Coming up with test data for Email Validation is a pain, can you help?
    • Do you have sample API code for Email Validation?
    • Where can I find a list of the inputs, outputs, error codes, etc for Email Validation?
    • I’ve signed up for a free trial for Email Validation - now what?
    See more

    What is email blacklisting?

    In short, it is the email naughty list. And sometimes good emails end up on it.

    This blog, Oh No, You've Been (Email) Blacklisted! Now What?, does a good job of explaining what blacklisting is, how it works and suggests ways to have email addresses removed from the lists.

    You might be asking this question because our DOTS Email Valdition product returned Warning Code, '16', which means the email address belongs to a 'BlacklistedDomain'. 

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