Opt-out helper functions

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The opt-out helper function lets you easily generate opt-out links to use within messages.
To give a customer the option to unsubscribe from receiving marketing messages, you can generate a dynamic link using the opt-out helper function. 
 The syntax of this helper function is:
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{{{optOutLink [channel?]}}}
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Please note the usage of triple braces {{{...}}}for the opt-out helper syntax. This is done to ensure that no variables required by a link tag is accidentally escaped. 
CrossEngage offers 3 types of opt-out:
1.Opt-out from the current channel a message was dispatched through
2.Opt-out from a particular channel
3.Opt-out from all channels
The links generated by the opt-out helper will only unsubscribe users from CrossEngage messages. This will not update the opt-out status of a user in a particular integration.
Opt-out from messages sent from the current channel:
To opt-out a user from the current channel a message was dispatched through, use the following syntax within a message template or mapping field value:
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{{{optOutLink}}}
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Opt-out from messages sent from a specific channel:
To opt out users from channels other than the one the message is dispatched through, use the following syntax within a message template or mapping field value:
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{{{optOutLink 'Channel'}}}
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Depending on the channel you would like to produce the link for, you may choose one of the following values:
Value
Description
MAIL
Opt-out from all marketing emails.
DIRECT_MAIL
Opt-out from all direct mail campaigns.
BROWSER_NOTIFICATION
Opt-out from browser notifications.
ONSITE_DISPLAY
Opt-out from all onsite display promotions.
EXIT_INTENT
Opt-out from all exit intent messages.
PUSH_NOTIFICATION
Opt-out from all push notifications across all devices.
SEGMENT_TRANSFER
Opt-out from all segment transfer campaigns, e.g. Facebook Custom Audiences. 
SMS
Opt-out from SMS messages.
WEBHOOK
Opt-out from all webhook campaigns.
Opt-out from messages sent from all channels:
To opt-out users from all channels, you simply need to replace the Channel value with ALL:
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{{{optOutLink 'ALL'}}}
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Use cases
Generating an opt-out link for an email message
For this example, we will prepare the opt-out link for an email message that will be dispatched as part of a future campaign. In the footer section of the email, we will include the opt out link through a hyperlink tag <a></a>:
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<footer>
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<p>Don't want to receive these emails?</p>
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<p>You can unsubscribe <a href="{{{optOutLink}}}">here</a>.</p>
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</footer>
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Once the function is evaluated, it displays a link similar to the following example:
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<footer>
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<p>Don't want to receive these emails?</p>
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<p>You can unsubscribe 
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<a href="https://api.crossengage.io/optout/inbound/webhook/[YourWebtrackingAPIkey]/[XngId]?channelType=MAIL&messageId=[CEMessageId]">here</a>.</p>
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</footer> 
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