The Predictive dialing mode in Genesys Cloud CX places multiple calls per available agent and uses algorithms to predict agent availability, aiming to maximize agent talk time by reducing idle time between calls.

Genesys Cloud CX enforces a maximum outgoing message size of 40 MB, including attachments, after base64 encoding. Base64 encoding increases the size of the original files by approximately 33%, so the combined size of the email body and attachments should be around 29 MB before encoding to stay within the limit. To manage larger files, you can upload them to Genesys Cloud Documents and include links to these documents in your email, effectively bypassing the attachment size limitation.
Reference:https://help.mypurecloud.com/faqs/acd-email-message-attachment-size-limits/

The Campaign Management container in Genesys Cloud CX is used to create, configure, and manage outbound campaigns, including setting up dialing modes, contact lists, and other campaign-related settings.

Preview APIs are made available as a preview of resources that are intended to be released publicly in the future.
Preview APIs are subject to both breaking and non-breaking changes at any time without notice.

Genesys Cloud CX aims to minimize breaking changes to maintain backward compatibility for its users.
When breaking changes are necessary, they are typically deferred until the next major revision of the API, ensuring a smoother transition for developers and users.