VoIP.info Guide

FreePBX voicemail administration

Separate mailbox access, notifications, retention and message-waiting behavior.

Reviewed 2026-10-10Current Sangoma FreePBX voicemail overview, Voicemail Admin and extension-setting documentation, FreePBX Voicemail 17.0.5.35 release/17.0 metadata, current FreePBX Core voicemail-destination source, and Asterisk 23 VoiceMail and VoiceMailMain application documentation reviewed October 10, 2026; Sangoma screen guidance may reflect older PBX GUI releases, and no PBX, module, extension, route, mailbox, context, greeting, PIN, dialplan, storage backend, message, email, MWI exchange, endpoint or live call was inspected or testedIntermediateDocumentation based · not lab tested

Treat the mailbox as a service

A mailbox needs a destination, greeting, access PIN, owner and retention policy. In FreePBX, voicemail is configured through extension-related and voicemail administration controls; do not look for an independent application with every possible mailbox setting.

Choose which unanswered or busy calls reach the mailbox. For a shared department, assign responsibility for retrieving messages and covering absences. A message arriving successfully is not useful if nobody owns the next action.

Set up and validate access

Enable voicemail for the intended extension, use a nontrivial unique PIN and record the appropriate greeting. Verify the configured feature codes in the local system; familiar defaults may have been changed. Submit and Apply Config after the relevant configuration changes.

Call from another extension, leave a message, retrieve it and delete the test message. Verify that the message-waiting indicator clears. Then repeat through the external number so routing and carrier DTMF are exercised too.

Test email without losing messages

Configure an approved mail delivery path and confirm receipt in the real recipient mailbox. Check spam handling, attachment size and the address of shared destinations. If delivery fails, follow the voicemail-to-email evidence path from the stored message through Asterisk's mail command, local queue, relay outcome and recipient handling before changing voicemail credentials.

Do not enable deletion after email until the organization accepts the recovery consequences and an end-to-end delivery test has passed. Email notifications, mailbox storage and backup retention are separate copies with separate access and deletion behavior.

Diagnose the failing layer

No greeting points toward routing or mailbox selection. A saved message with no lamp points toward subscription or notification behavior. A lamp with no email points toward mail delivery. Use the voicemail troubleshooting guide to isolate the layer and retest after changing one setting.

When a stored message is correct but the phone lamp is stale, use the focused MWI investigation to separate mailbox identity, generated endpoint mapping, subscription mode, NOTIFY delivery and the phone display.

Diagnose deposit and retrieval before notifications

When a caller reaches the wrong mailbox, hears the wrong greeting, leaves a message that disappears or the owner cannot retrieve it, use the focused FreePBX voicemail diagnostic. It follows the managed destination, mailbox@context, VoiceMail result, stored audio and authenticated VoiceMailMain path before branching into email or MWI.

Watch the explanation

25 - Announcements - FreePBX 101 v15Crosstalk Solutions · 7:29 · Version-specific

Explains the relationship between a system recording, an announcement and the next destination. The voicemail examples show how to avoid playing two greetings in succession.

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FreePBX 15 interface from 2021; the routing concept remains useful on the FreePBX 17 baseline. Review used the available transcript and primary references; audio and screen readability remain unverified.

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Sangoma P-phones: use the visual voicemail listSangoma · Version-specific

Follow the message indicator into a list of individual messages, select a recording and use playback or callback. This helps explain the difference between an integrated visual voicemail application and a simple message-waiting lamp that sends a user to an audio menu.

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P-series workflow associated with the P320/P325/P330 family. Application availability and exact controls vary across Sangoma platforms and firmware. Review used the available transcript and primary references; audio and screen readability remain unverified.

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Sources & applicability

Primary references for the technical details above. Operational examples and planning checklists are VoIP.info editorial guidance.

Examples require adaptation to your topology. No live PBX or hardware testing is claimed.