Who This Is For / When to Use
This article is for users who want to include voicemail drops in automated follow-up workflows.
Use this action when you need to:
Leave a voicemail after an unanswered call.
Add voicemail as a final outreach step after SMS and call attempts.
Standardize voicemail follow-ups without manual dialing.
Step 1: Create or Open a Workflow
Navigate to Automations.
Click Workflows.
Select Create Workflow or open an existing workflow from the list.
Step 2: Confirm or Add Workflow Triggers
Review existing triggers at the top of the workflow.
Optionally click Add New Trigger to add additional triggers.
Example use case:
An SMS is sent → a call is attempted → a voicemail is dropped as the final step.
Step 3: Add the Voicemail Action
Click the + icon where you want to add the voicemail step.
The Actions panel opens on the right.
Search for Voicemail or scroll to the Communication section.
Select Voicemail.
Step 4: Upload a Voicemail File
Enter an Action Name (optional).
Click Upload File.
Select a pre-recorded voicemail audio file from your device.
Step 5: Save the Action
Click Save Action in the bottom-right corner of the action panel.
Confirm the voicemail step appears in the workflow path.
Important:
If you close the action panel without saving, the voicemail file will not be retained.
Step 6: Save, Test, and Publish the Workflow
Click Save in the workflow builder.
Use Test Workflow to validate execution.
Toggle the workflow to Publish when ready.
Voicemail Drop Behavior and Limitations
Voicemail drops work approximately 70% of the time.
This feature uses a carrier-level workaround to leave voicemails faster.
Delivery success depends on carrier policies and network conditions.
Phone carriers may block or filter voicemail drops if usage appears spam-like.
Audio File Requirements
Recommended format: MP3
Required sample rate: 8000 Hz (8 kHz)
Why 8000 Hz matters:
Telephone networks are optimized for speech and operate at an 8000 Hz sample rate. Higher-quality audio files (such as 44,100 Hz) may fail to play correctly or be rejected by carrier systems.
Common Issues and Fixes
Voicemail Does Not Play or Fails to Deliver
Convert the audio file to MP3 at 8000 Hz using an online audio converter.
Re-record the voicemail using a compatible voice recorder.
Re-upload the converted file and save the action again.
Voicemail Action Did Not Run
Confirm the workflow is Published.
Check execution logs to verify the voicemail step was reached.
Ensure the contact has a valid phone number.
FAQ
What is the Voicemail workflow action?
The Voicemail workflow action drops a pre-recorded voicemail to a contact automatically as part of a workflow.
How do I add a Voicemail action to a workflow?
Click the + icon in the workflow, select Voicemail from the Communication actions, upload an audio file, and save the action.
What should I do if my voicemail file is not working?
Convert the file to MP3 with an 8000 Hz sample rate or re-record the voicemail using a compatible recorder, then upload it again.
How effective are voicemail drops?
Voicemail drops succeed approximately 70% of the time. Delivery depends on phone carrier rules and network conditions.
Can I use the Voicemail action with other workflow steps?
Yes. It is commonly used after SMS and call actions as a final follow-up attempt.
What file types are supported?
MP3 audio files are recommended for best compatibility.
Can I preview the voicemail inside the workflow builder?
No. There is currently no built-in preview option. Always test the audio file before uploading.
What happens if I close the action without saving?
Any uploaded voicemail file will be lost, and the action must be added again.
Why do carriers sometimes block voicemail drops?
Carriers may flag high volumes of identical audio files as spam. Keep voicemails short, relevant, and conversational to improve delivery rates.