---
title: "An email isn't sending"
description: "Use the email log and connection settings to find why an outgoing email failed."
image: "https://booleansmtp.com/docs/og.png"
---

> Documentation Index
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# An email isn't sending

An outgoing email may fail because its connection is inactive or the provider rejected its credentials. Start with the
message's log entry.

1. Open **Email Logs** and find the message. Its status and error message show what the provider reported.
2. Open the connection it should have used, under **Mailers**, and confirm it is switched on.
3. Click **Verify credentials** (or **Re-verify credentials**) on the connection to check them with the provider again.
4. If it still fails, turn on **Log mailer resolution to PHP error log** in **Settings → Logging & Retention**, send the
   email again, and check your server's PHP error log for the line tagged `[boolean-smtp]`. It names the connection and
   transport BooleanSMTP chose.

If a test reported success but did not arrive, follow
[the missing-email checks](/docs/troubleshooting/email-not-arrived/). For a failed message that is not retrying, see
[Fallback and retries](/docs/advanced/fallback-and-retries/).

## Next steps

- [View email logs](/docs/logs/)
- [Connection and authentication errors](/docs/troubleshooting/connection-errors/)
- [Troubleshooting overview](/docs/troubleshooting/)

Source: https://booleansmtp.com/docs/troubleshooting/email-not-sending/index.mdx