This page contains general information, please refer to the specific API methods to better understand what is available in MailUp APIs (i.e. SOAP, REST, HTTP GET/POST...)

Subscription and Unsubscription

Subscription and unsubscription always refer to a specific MailUp list and a specified MailUp channel (email, SMS, Fax)
A recipient may belong to zero, one or more groups of a list, please take care that the
For each MailUp channel, the recipient's statuses "subscribed", "unsubscribed" and "pending" (when Confirmed Opt-In, COI, applies) are mutually exclusive on a specified list
Email address and mobile number are primary keys in MailUp: there cannot be two recipients with the same email address or with the same mobile phone number

Personal data fields

Personal data fields are shared through all the channels of a console account
If you have the "Marketing+" option 26 personal data fields are available by default when a console account is created and you can increase them up to 39 through your admin console account (not through API)
If you do not have the "Marketing+" option only 11 fields are fully accessible
You can rename personal data fields
Data Type for personal data fields is nvarchar(200)

Automatic unsubscription

Recipients can be automatically unsubscribed from the email channel of all lists of a console account in case of hard bounces
Recipients have automatically unsubscribed from the email channel specified lists of a console account in case of feedback loop (i.e. reported as spam)

Importing recipients into MailUp

You can use API to force opt-in for unsubscribed recipients, but you shall do that only when the recipient wants to be subscribed again. In case of abuse, your console account may be blocked.
You cannot use API to force opt-in in case of unsubscription due to bounces
You can use API to import recipients into a specified list/group. Synchronous import has to be used to manage a single subscription and, in some cases, it can be applied even to a very small set of recipients. With more than ten recipients asynchronous import is recommended.
Asynchronous import is always sequential, if you call API several times in a very short time frame the import tasks are processed in a "FIFO" manner
You can use API to perform a bulk import of recipients. Refer to the specific API methods to know the maximum size of an import block that can be specified for a single call

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