Disclaimer: 

To help you seamlessly comply with the Telephone Consumer Protection Act (or TCPA), Heymarket offers automatic Opt-out. 

Protected Keywords

Opt-Out

When messaging a contact, they may respond with any of the following opt-out keywords: STOP, STOPALL, UNSUBSCRIBE, CANCEL, END, QUIT.  If any of these keywords are received, the contact will automatically be opted out, which means you will no longer be able to message them. The messaging window will display who initiated the opt out. Below is a screenshot example of the chat contact pane and message window for an opted out contact:

Opt-In

To reinitiate communication with you, the contact may send one of the following opt-in keywords: START, YES, UNSTOP. Once the opted out contact messages one of these keywords to your Heymarket number, you will see a normal chat window, and the status will return to “Active.”

You can also manually opt-out contacts if they do not fulfill the automatic requirements listed above. To opt out a contact, click the drop down arrow for “Status” in the contact pane and click 'Opt Out':

The messaging window will display who initiated the opt out(shown below).

It's important to understand that for Blocked contacts, messages cannot be received from or sent to the contact whereas for Opt Out contacts messages cannot be sent to the contact.

Bulk Opt-Out from Failed Messages

You can opt out multiple contacts at once directly from a Broadcast, Campaign, or List message report. This is useful for quickly removing contacts with invalid numbers, landlines, or other delivery failures that would otherwise waste messaging credits and impact sender reputation.

To bulk opt out contacts with failed messages:

Navigate to the report for the sent message (e.g., from the Broadcasts, Campaigns, or Lists section).
Click the Failed tab in the Contacts section to filter for contacts whose messages failed to deliver.
Select the contacts you want to opt out using the checkboxes. You can select individual contacts or use the top checkbox to select all. Click Opt-Out SMS in the action bar that appears above the contact list.

The selected contacts will be marked as Opted-Out or Deleted and will no longer receive messages from your team. As with any opted-out contact, their status can be viewed in the contact pane.
 

This is a faster alternative to opting out contacts one by one from the contact pane, especially after a large send where multiple messages failed due to invalid or unreachable numbers.

Note: The keywords for opt-out and opt-in are case insensitive. Also, any leading or trailing spaces are ignored.