---
title: addAll3Flat
slug: campaign/docs/addall3flat
docTags: 
createdAt: 2026-07-02T19:01:45.941Z
---

Be aware of the different behavior of this method according to the recipient status:

- If there is already a recipient with the same ID and the same type of opt-in process that has not completed the opt-in process, the recipient is removed and re-added. If one of the opt-in processes is a double opt-in process and the other is not, the double opt-in process has a higher priority (see [Prioritization of parallel opt-in processes](docId:1E5S4MmWzP3r8i1F0zA9e)).

Be aware of the different behavior of this method according to the target recipient list:

- If a recipient is unsubscribed and the target recipient list an opt-in list, the recipient will be re-activated with this method and the unsubscribe status will be reset.
- If a recipient is unsubscribed and the target recipient list a regular list, the unsubscribe status will not be changed and the recipient will not receive any further emails.

This is a .NET replacement method. For other applications use the method [addAll3](docId\:lR88hi4bnBY8cyUuW0soB).

**Type**: int\[ ]

**Parameters**

| Name                | Type       | Description                                                                                                                                                                                                                 |
| ------------------- | ---------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| sessionId           | String     | ID of the session                                                                                                                                                                                                           |
| recipientListId     | long       | ID of the recipient list                                                                                                                                                                                                    |
| optinProcessId      | long       | ID of the opt-in process<br /><br />The recipient will be processed with the given opt-in process identified by this ID. If no opt-in process shall be used and the recipient be activated immediately, set the value to 0. |
| recipientIds        | String\[ ] | IDs of the recipients                                                                                                                                                                                                       |
| emailAddresses      | String\[ ] | Email addresses of the recipients                                                                                                                                                                                           |
| attributeNames      | String\[ ] | Defines a map of recipient attributes in association with flatAttributeValues according to the following pattern: 'firstname'==>'John','lastname'==>'Doe'                                                                   |
| flatAttributeValues | String\[ ] | Defines a map of recipient attributes in association with attributeNames according to the following pattern: 'firstname'==>'John','lastname'==>'Doe'                                                                        |

**Return values**

For each recipient:

- 0: Recipient has been inserted
- 1: Recipient validation failed, e.g., due to invalid email address syntax
- 2: Recipient is unsubscribed
- 3: Recipient is blocked
- 4: Recipient is bounce overflowed (i.e. produced too many bounces in the past)
- 5: Recipient is already in the list
- 6: Recipient has been filtered
- 7: A general error occurred

**Code structure**

```csharp
int[] addAll3Flat(String sessionId, long recipientListId, long optinProcessId, String[] recipientIds, String[] emailAddresses, String[] attributeNames, String[] flatAttributeValues)
```