I second this feature request. You can send bulk invitations via the API, but the only way to process bounced e-mails is calling the function manually for each survey in the GUI. It would make a lot of sense to call this function from the remote control api.

The 'raw' function only needs a survey id as parameter: https://github.com/LimeSurvey/LimeSurvey/blob/a6e0c855638c010a29204f741751c95a9537c0c9/application/controllers/admin/Tokens.php#L77
All the logic is written, we would just need a way to activate it, return call results and errors.

See also the following forum thread: https://forums.limesurvey.org/forum/can-i-do-this-with-limesurvey/127458-activate-bounce-processing-from-remote-control-api#228543

I very much need this. It makes no sense to only have this in the application but not having it available in the api. Everything else is there (mail status, bulk mail send), but not something to call the processing of the bounced mailbox.