# Why Aren't My Emails Sending?

> A checklist, in order, for when Revnu's emails aren't going out. Each check says where to look and how to fix it, from an approval that's still waiting to a payment problem, plus what happens to emails that were waiting.

Canonical: https://revnu.com/docs/emails-not-sending
Last updated: 2026-10-18

> **Note:** **Connected** on the **Connections** page doesn't mean the mailbox can send. A mailbox can show as connected and still be paused, blocked by your email provider, at its daily limit, or waiting on an approval.

Match what you see to the right check:

| What you see | Go to |
|---|---|
| Nothing sent, and nothing in Review | [1. An approval](#1-is-an-approval-still-waiting), then [2. A mailbox](#2-is-a-mailbox-connected) |
| The row says **Needs Reconnect** | [3. Reconnect](#3-does-the-mailbox-need-reconnecting) |
| It sent, then stopped | [8. Revnu paused the mailbox](#8-did-revnu-pause-a-mailbox-to-protect-it) |
| "Undeliverable" notices about the sender | [9. Your provider blocked it](#9-has-your-email-provider-blocked-the-mailbox) |
| Revnu says it couldn't verify addresses | [6. Email verification](#6-does-revnu-say-email-verification-is-unavailable) |

Otherwise, work down this list in order. Most problems are one of the first few:

### 1. Check Review

Open **Review** and approve anything waiting. Your first sequence always waits for you. [Check 1](#1-is-an-approval-still-waiting).

### 2. Check a mailbox is connected

Open **Connections > Reach People**. Gmail or Outlook must say **Connected**, not **Needs Reconnect**. [Checks 2 and 3](#2-is-a-mailbox-connected).

### 3. Check the leads have an email

Open **Leads**. Leads still in **Prospects** or **Qualified** have no email ready. [Check 5](#5-do-the-leads-have-a-working-email).

> **Tip:** You can also ask Revnu "why hasn't anything sent?" It checks the same things and tells you what's holding it up.

## 1. Is an approval still waiting?

**Where to look:** **Review** in the dashboard. Then, on **Leads**, pick the campaign and check the steps pill next to it (for example **3 Steps**). **Needs Approval** means it's waiting for you.

Your first sequence always waits for your approval. A sequence can also wait again after Revnu changes its copy, even by one link. One-off emails wait if **One-Off Emails** is set to **Ask Me First** in **Settings > Agent**.

**Fix:** Approve the sequence or the email cards. See [sequences](/docs/sequences).

## 2. Is a mailbox connected?

**Where to look:** The sequence shows **Needs an Inbox** and "Nothing can send until you connect an inbox." Or **Connections > Reach People** has no Gmail or Outlook connected.

Approving a sequence doesn't send anything on its own. Without a mailbox, nothing can leave.

**Fix:** Connect Gmail or Outlook. See [connect Gmail or Outlook](/docs/connect-email). Buying sending inboxes is a separate, optional step.

## 3. Does the mailbox need reconnecting?

**Where to look:** The Gmail or Outlook row in **Connections** says **Needs Reconnect**. In **Inbox**, the account menu says "Needs reconnecting" next to it.

**Fix:** Press **Reconnect** and sign in again. Only the teammate who connected that mailbox can reconnect it. Until you do, emails due from it fail instead of sending, so ask Revnu to send them again afterwards. Revnu messages you within a few minutes of a mailbox dropping, with how many emails are waiting and the reconnect link. If nobody messaged you but sending stopped, check **Connections** for **Needs Reconnect** anyway.

## 4. Are your sending inboxes still warming up?

**Where to look:** In **Inbox**, open the account menu. A sending inbox Revnu bought says **Warming up** until it's ready.

**Fix:** Wait, or connect your own Gmail or Outlook to send meanwhile. Warm-up takes days to weeks. See [sending inboxes](/docs/sending-inboxes).

## 5. Do the leads have a working email?

**Where to look:** **Leads**. Leads still in **Prospects** or **Qualified** have no email ready. A lead in **Declined** may be one Revnu couldn't find an email for.

Revnu checks every address before it sends and holds back any that would bounce, to protect your mailbox. Revnu's own sending inboxes only email addresses that pass a full check.

**Fix:** Ask Revnu "which leads are missing an email?" It can look again, use the company's general address, or find other people at the same company. Don't ask it to skip the check.

## 6. Does Revnu say "email verification is unavailable"?

**Where to look:** Revnu tells you in chat that it couldn't verify addresses, and the leads stay in **Qualified** or **Drafted** instead of moving to **Sending**.

Revnu's address check was down or failed. Revnu doesn't send to an address it couldn't check, because a bounce costs your mailbox more than a late email. Those emails are held, not sent. It's a problem on Revnu's side, not yours.

**Fix:** Nothing to change in your account. Ask Revnu to check the addresses again later, and "which emails are still held?" to see what's waiting. A held email stays out of **Sent** until it actually goes. You can't skip the check.

On a trial, the trial's end time doesn't move while checks are down. If an outage took up your trial, ask about it at support@revnu.com.

## 7. Did you pause?

**Where to look:** **What Needs Your Approval** in **Settings > Agent**. If every setting says **Ask Me First** and you didn't set them that way, someone said "pause", "stop sending" or "ask first".

Pausing switches every approval setting to **Ask Me First** and cancels emails that were waiting to send. Replies you already approved still go.

**Fix:** Set the settings back the way you want them, and ask Revnu to send the cancelled emails again.

## 8. Did Revnu pause a mailbox to protect it?

**Where to look:** Ask Revnu "is any of my mailboxes paused, and why?"

Revnu pauses a mailbox you connect on its own when something looks risky:

| What happened | How long it pauses |
|---|---|
| 5% or more of its recent emails bounced, once it has sent at least 20 | 3 days |
| The email provider refused to send from it 3 times in 24 hours | 3 days |
| The provider limited sending, or the connection needs signing in again | 1 day |
| 3 sending errors in a row | 6 hours |

Emails that were waiting move to after the pause.

**Fix:** Usually nothing: sending resumes on its own. If bounces caused it, ask Revnu to check the list it's sending to. If the provider blocked the mailbox, see the next check.

## 9. Has your email provider blocked the mailbox?

**Where to look:** Revnu messages you that your email provider is blocking outgoing mail from an address. Your mailbox may also hold "Undeliverable" notices that say the sender was blocked, such as a 5.1.8 or 5.7 error code.

Microsoft or Google sometimes stops accepting mail from an address it thinks sends spam, often a brand-new mailbox sending cold email. After 3 of those bounces in 24 hours, Revnu pauses that mailbox for 3 days and marks those contacts as bounced. They never got the email.

**Fix:** Reconnecting won't help. Your email admin has to release the address: on Microsoft 365, under **Restricted entities** in the Microsoft Defender portal; on Google Workspace, from the alert center in the Google Admin console. If the block is still there when the pause ends, Revnu pauses again. Meanwhile, send from another mailbox or let Revnu buy sending inboxes. See [will Revnu's emails land in spam?](/docs/deliverability).

## 10. Is there a payment problem?

**Where to look:** A banner at the top of the dashboard, and **Settings > Account**.

If a renewal fails, you get three days while the payment is retried. After that, Revnu pauses everything, including email. The banner shows how many emails are ready to send.

**Fix:** Press **Try My Card Again** or **Pay Another Way** on the banner. The waiting emails go out once you've paid. See [payment problems](/docs/payment-problems).

## 11. Is the trial waiting for a card?

**Where to look:** A full-screen message: **Add Your Card to Keep Going**.

If your trial started without a card, Revnu pauses at this point until you add one.

**Fix:** Add your card. Revnu picks up where it stopped. Nothing is charged before the trial ends. See [the free trial](/docs/free-trial).

## 12. Is it outside the sending window, or over the limit?

**Where to look:** On **Leads**, pick the campaign, press the steps pill next to it and open **Settings**. It shows the **Sending Window** and **Timezone**. Ask Revnu "how many went out today?" for the count.

Revnu's sending inboxes send only on weekdays, inside the window, in your prospects' time zone. On Pro, your own mailbox ignores the window, but it sends at most 50 a day and 20 an hour. Follow-ups wait their set number of weekdays.

**Fix:** Usually none: the emails go at the next open slot. To widen the window or change the time zone, edit it there or tell Revnu. See [sending limits](/docs/email-sending-limits).

## What happens to emails that were waiting?

| What stopped sending | Waiting emails |
|---|---|
| You said pause or ask first | Cancelled. Ask Revnu to send them again. |
| Mailbox needs reconnecting | Fail as they come due. Ask Revnu to resend after you reconnect. |
| Revnu paused a mailbox to protect it | Moved to after the pause. |
| The email provider blocked the mailbox | Moved to after the pause. Contacts whose email bounced aren't retried. |
| Email verification was unavailable | Held until a check passes. |
| Payment problem | Held, then sent once you've paid. |
| Trial waiting for a card | Held until you add a card. |
| Outside the window or over the limit | Sent at the next open slot. |

## Still stuck?

Ask Revnu "what's stopping my emails?" first. If that doesn't help, see [get help from a person](/docs/get-help).

## Frequently asked questions

### I approved the sequence. Why has nothing been sent?

Usually because no mailbox is connected. Approval doesn't send on its own. Connect Gmail or Outlook in Connections > Reach People, and Revnu starts the sequence within minutes. If a mailbox is connected, check that the leads have a working email.

### My mailbox says Connected. Why can't it send?

Connected only means Revnu can reach the mailbox. It can still be paused after bounces, blocked by your email provider, at its daily limit, or waiting on your approval. Ask Revnu "what's stopping my emails?", or use the table at the top of this page.

### Gmail shows as connected but sending stopped. What do I do?

Open Connections and check the Gmail row. If it says Needs Reconnect, press Reconnect and sign in again, then ask Revnu to resend anything that failed. If it's connected, ask Revnu whether a mailbox is paused or blocked, or the daily limit was reached.

### Why does Revnu say email verification is unavailable?

Revnu checks every address before it sends, and when that check can't run it holds the emails so nothing bounces. They send as soon as a check passes. Ask Revnu to check the addresses again later, and keep the check on.

### Why did my mailbox stop sending after emails came back as "Undeliverable"?

Your email provider is blocking mail from that address. After 3 of those bounces in 24 hours, Revnu pauses the mailbox for 3 days and tells you. Your email admin has to release the address; reconnecting won't fix it.

### Are my queued emails lost if I pause?

Pausing cancels emails that were waiting to send, and Revnu tells you which. Ask Revnu to send them again when you're ready. A payment pause is different: those emails are held and go out once you've paid.

### Does my own inbox send on weekends?

On Pro, yes. Your own connected mailbox sends each email within minutes of your approval, on any day. The weekday rule and sending window apply to the sending inboxes Revnu buys.