Global email suppression

Preventing email messages from being sent to people who do not want them, or to mailboxes that do not exist, helps to maintain your email reputation. HCL Unica provides a method to prevent email messages from being sent to recipients that have opted-out, regardless of the mailing list to which recipient belongs. This practice is called global email suppression.

Global email suppression is intended to serve as a supplement to your own email list hygiene practices. Deliver sends a record of each email it suppresses to the Deliver system tables maintained in your local environment. You can use these records to keep your mailing lists up to date.

For more information about where responses are stored in the Deliver system tables, see the Deliver System Tables and Data Dictionary.

An email address is added to a global email suppression list maintained by HCL Unica under the following conditions.

  • HCL Unica receives notification from an ISP that an email recipient marked your email as spam.
  • The recipient clicks the unsubscribe link in an email client that supports Support for List-Unsubscribe.
  • HCL Unica receives an email from the recipient that contains the word unsubscribe in the subject line.
  • HCL Unica determines that the email address is not an actual email address; for example, if the email domain is obviously misspelled (such as htmail.com instead of hotmail.com)

Each time you run a mailing, Deliver automatically compares the mailing list referenced by the mailing configuration to the global email suppression list. The system prevents email transmission to any address in the mailing list that is also included on the global email suppression list.

Note: Deliver does not check the global suppressions list when it processes transactional email requests.

Deliver does not apply global suppression based on replies to unsubscribe landing page hosted by Unica or corporate unsubscribe web pages that you create. If you create an unsubscribe landing page to allow email recipients to opt-out, you must use your own internal systems to process the requests and remove the individuals from your mailing lists.