The Email Opt-in Postback API notifies you of the an opt-in or opt-out status change for each email address subscribed to your campaigns.

Email Subscribe

This postback notification triggers when an email address subscribes to a specific campaign.

Variable Description
ORIGIN EMAIL_SUB.
CODE N303.
EMAIL Subscriber’s email.
CAMPAIGNID ID of the campaign.


<?xml version='1.0'?>
<POSTBACK>
    <ORIGIN>EMAIL_SUB</ORIGIN>
    <CODE>N303</CODE>
    <EMAIL>info@skycore.com</EMAIL>
    <CAMPAIGNID>89</CAMPAIGNID>
</POSTBACK>

Email Unsubscribe

This postback notification triggers when an email address unsubscribes to a specific campaign.

Variable Description
ORIGIN EMAIL_SUB.
CODE N304.
EMAIL Email address of the subscriber.
CAMPAIGNID The ID of the campaign.


<?xml version='1.0'?>
<POSTBACK>
    <ORIGIN>EMAIL_SUB</ORIGIN>
    <CODE>N304</CODE>
    <EMAIL>info@skycore.com</EMAIL>
    <CAMPAIGNID>89</CAMPAIGNID>
</POSTBACK>