---
title: "Fix a disconnected mailbox | FirstSales"
description: "Reconnect a Google or Microsoft mailbox when its authorization lapses, or re-test a credential mailbox — so sending never silently stops."
canonical: "https://firstsales.io/tutorial/reconnect-a-mailbox/"
---

[Home](/)/[Tutorials](/tutorial/)/Fix a disconnected mailbox

Mailboxes

# Fix a disconnected mailbox

Reconnect a Google or Microsoft mailbox when its authorization lapses, or re-test a credential mailbox — so sending never silently stops.

4 min read·Beginner·7 steps

1. 1  
## Connectors → open the mailbox  
When a campaign stops sending from an account, open it from **Connectors** and look at the **Details** tab first.
2. 2  
## Spot the expired-token alert  
For Google or Microsoft mailboxes, a disconnected token shows an amber alert with the failure reason and a prominent **Reconnect Account** button.  
![Spot the expired-token alert](/tutorials/reconnect-01-expired-alert.webp)
3. 3  
## Click Reconnect Account (OAuth)  
For Google or Microsoft, click **Reconnect Account**, re-authorize in the popup, and the mailbox is live again — no password stored.
4. 4  
## Or run Test Connection  
If there's no alert but you suspect a problem, click **Test Connection**. Success shows _“Connection verified!”_ An OAuth failure is turned into reconnect guidance automatically.  
![Or run Test Connection](/tutorials/reconnect-02-test-connection.webp)
5. 5  
## Check Verified / Last verified  
These fields confirm the mailbox's current auth state and when it last passed a check — a stale **Last verified** date is a hint to re-test.
6. 6  
## Fix credential (SMTP/IMAP) mailboxes  
Credential mailboxes have **Test Connection** but no OAuth reconnect. If the test fails — for example after a rotated app password — delete the connector and re-add it with fresh credentials.
7. 7  
## Re-check sending  
After reconnecting, confirm the mailbox is still selected in your campaign's senders and that its daily limit and warm-up settings are intact.

## Pro tips

Hard-won shortcuts that keep warm-up on track.

1

### Check Connectors first when sends drop

A disconnected mailbox is the most common cause of a campaign that stopped sending. The Details tab tells you in one glance.

2

### Reconnect keeps your settings

OAuth reconnect restores authorization without wiping the mailbox's daily limit, warm-up, or signature — you don't rebuild anything.

3

### Rotated an app password? Re-test, then re-add

Credential mailboxes can't reconnect in place; a failed test after a password change means delete and re-add with the new one.

4

### Watch for the alert proactively

The amber token alert appears the moment a test detects a lapse — don't wait for a customer to report silence.

## Frequently asked questions

My campaign stopped sending from one mailbox — why?

Most often its authorization lapsed. Open the mailbox in **Connectors** — a Google/Microsoft token expiry shows a reconnect alert.

How do I reconnect a Google or Microsoft mailbox?

Click **Reconnect Account** on the **Details** tab and re-authorize in the popup.

Does reconnecting lose my settings?

No — daily limit, warm-up, and signature stay in place; only the authorization is refreshed.

What does Test Connection do?

It verifies the mailbox can send (and read, for IMAP); an OAuth failure is turned into reconnect guidance.

There's no Reconnect button on my SMTP/IMAP mailbox — why?

Reconnect is OAuth-only (Google/Microsoft). Credential mailboxes use **Test Connection**; if it fails, re-add the connector with fresh credentials.

How do I fix a mailbox after changing its app password?

Re-test it; if the test fails, delete the connector and add it again with the new password.

How do I know when a mailbox last worked?

The **Last verified** field shows when it last passed a connection check.

Will FirstSales alert me automatically?

The expired-token alert appears the moment a test detects a lapse; also watch the Alerts center for mailbox-down notices.

## Ready to put this into practice?

Start your FirstSales trial and launch a warmed, authenticated mailbox in minutes.

[Start for $1](https://app.firstsales.io)

[All tutorials](/tutorial/)