### Answer Yes, Retell AI supports voicemail detection during call transfers with configurable actions. [(1) ]() When you configure a warm transfer, you can set up Agent Detection Timeout to control how long the AI will wait for the agent to pick up. [(1) ]() [(2) ]() If the timeout is exceeded, the transfer is considered failed and you can trigger fallback actions. The available fallback actions include: - Sending a text - Scheduling a callback - Rerouting the call - Leaving a voicemail message Additionally, Retell AI's warm transfer feature includes Automatic Human Detection that confirms a human has answered before completing the transfer, preventing failed connections to voicemail. To set this up, configure the Agent Detection Timeout in your transfer call settings to define the maximum time to wait for the agent to pick up, and specify what action should occur if that timeout is exceeded. [(2) ]()

​ To learn more, see the sources I considered: [[1] Platform Changelogs | Retell AI](https://www.retellai.com/changelog) [[2] Warm Transfer vs Cold Transfer - The AI Advantage in Call Centers | Retell AI](https://www.retellai.com/blog/effortless-handoffs-with-retell-ais-warm-transfer-feature) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer Based on the available sources, when Retell AI detects a voicemail, you can configure it to leave a message, but the message options are: [(1) ]() 1. **Prompt-based message**: A dynamically generated message based on instructions you provide, such as "Summarize the call and ask the user to call back." 2. **Static Sentence**: A fixed message that you pre-define, such as "Hey {{user_name}}, sorry we could not reach you directly. Please give us a callback if you can." The sources don't indicate that the AI agent can relay or repeat a specific message that the original caller (the person who initiated the call) wants to state. The voicemail message is either dynamically generated by the AI based on your prompt instructions or uses a static template you've configured. If you need the ability for callers to record their own custom voicemail messages that get relayed, I don't have information about that capability in the available sources.

​ To learn more, see the sources I considered: [[1] Handle voicemail and IVR](https://docs.retellai.com/build/handle-voicemail) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.