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WP Mail SMTP is the most popular WordPress SMTP and PHP mailer plugin that helps your site send emails more reliably.

You can learn more about WP Mail SMTP here and you can see all our available features here.

When using WP Mail SMTP, you can choose to have your emails authenticated and sent reliably to your recipients using one of the popular email delivery integrations like Amazon SES, Outlook, Zoho, Gmail, SendGrid, Mailgun, SMTP.com, or our #1 recommended mailer, SendLayer. Alternatively, you can use WP Mail SMTP to send emails through your preferred email provider's SMTP mail configurations.

In simple terms, it will be very similar to logging in to your email account and sending an email. In this way, you will have a much better chance of delivering your emails to the recipients without the email getting flagged as spam.

In more technical terms, all of your website's emails sent with the WordPress default wp_mail() function will be routed through your WP Mail SMTP configured mailer.

If you'd like to learn more, please finish filling out this form to create a support ticket.

All of our pricing terms are annual.

In case it helps to know, we are currently offering a discount for the first year of any license subscription. You can find the details here

If you'd like to learn more, please finish filling out this form to create a support ticket.

Please refer to this section of our documentation that covers our upgrade process and prorated pricing here.

If you'd like to learn more, please finish filling out this form to create a support ticket.

Absolutely you can purchase and upgrade multiple licenses under the same account.

In case it helps to know, we are currently offering a discount for the first year of any license subscription. You can find the details here

If you'd like to learn more, please finish filling out this form to create a support ticket.

- Solution 1

To resolve this, you will likely need to refresh your access token by following these steps:

1. Navigate to the WP Mail SMTP -> Settings page.

2. Click on the red "Remove OAuth Connection" button to remove the existing Microsoft Outlook mailer connection.

3. Then, reconnect by clicking on the "Allow plugin to send emails using your Microsoft account" button. This will establish a new connection.

- Solution 2

If the above does not resolve the issue, there are a few areas in your Microsoft Azure connection to check:

1) While creating the Azure app registration, the "Supported account types" setting should be set to "Accounts in any organization directory (Any Azure AD directory - Multitenant) and personal Microsoft accounts (e.g. Skype, Xbox)". Please be sure to adjust this setting in Azure.

To confirm if you've already completed this step, please head over to your Azure portal (https://portal.azure.com/) and view your App registrations (you may have to use their search bar to find App Registrations).

In case it helps, the "Supported account types" step is mentioned during the App Registration process in our documentation as well.

2) Another common reason for this error is that you may have copied the ID instead of the Value of the Application Password within your Azure client secret (as shown here).

Please head over to your Azure portal, and in the App registrations > Certificates & secrets section, create a new client secret. Now, you can enter it under your WP Mail SMTP > Settings page and try to reconnect.

3) If you are redirected to the dashboard of your site when you try connecting WP Mail SMTP to Microsoft, can you copy the full URL that shows up after the redirect? This may give us better insights into any technical issues.

- Need more assistance?

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

This error means that you are using a different From Email in the From Email field, instead of the one you authorized the connection with.

Please note that as of WP Mail SMTP Pro v3.4, you have the ability to send Office 365 emails using your other email accounts, shared mailboxes, etc.

To send emails on behalf of other email addresses, you need to add the necessary permissions by following our guide here

Additionally, if you only intend to send from the connected address, as mentioned in this section of our documentation, you should also ensure that the "Force From Email" box is checked

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

This error means you're trying to authenticate an Office 365 email account that does not have REST API enabled which is a requirement for the Microsoft 365/Outlook mailer.

You can read more information on how to address this issue here.

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

- AADSTS50173

To resolve this, you will likely need to refresh your access token by following these steps:

1. Navigate to the WP Mail SMTP -> Settings page.

2. Click on the red "Remove OAuth Connection" button to remove the existing Microsoft Outlook mailer connection.

3. Then, reconnect by clicking on the "Allow plugin to send emails using your Microsoft account" button. This will establish a new connection.

- AADSTS50011

While creating the Azure app registration, the "Supported account types" setting should be set to "Accounts in any organization directory (Any Azure AD directory - Multitenant) and personal Microsoft accounts (e.g. Skype, Xbox)". Please be sure to adjust this setting in Azure.

To confirm if you've already completed this step, please head over to your Azure portal (https://portal.azure.com/) and view your App registrations (you may have to use their search bar to find App Registrations).

In case it helps, the "Supported account types" step is mentioned during the App Registration process in our documentation as well.

- AADSTS7000215

You may have copied the ID instead of the Value of the Application Password within your Azure client secret (as shown here).

Please head over to your Azure portal, and in the App registrations > Certificates & secrets section, create a new client secret. Now, you can enter it under your WP Mail SMTP > Settings page and try to reconnect.

- Need more assistance?

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

This error indicates that your mail server is refusing the SMTP connection.

To fix this, you'll need to contact your website hosting provider and share the error message with them. They should be able to advise on why the connection is being refused and resolve the issue.

In case it helps, please let them know that you are following our guide here to set up the connection.

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

This section of our documentation covers the app password generation process for popular email providers like Google, Yahoo, etc.

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

This error message means that your Brevo API key is invalid. In other instances when we've seen this, it means only part of your API key was copied over (for example).

Please head over to your Brevo SMTP & API settings page (https://app.brevo.com/settings/keys/api) and delete your existing API key.

Then you can add a new API key, copy the full key and update the WP Mail SMTP > Settings page.

Once you've completed those steps, try sending a test email from WP Mail SMTP > Tools.

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

This error message usually means that your website’s IP address is not whitelisted in Brevo's (Authorized IPs section).

To confirm your website's IP address, please insert your domain (for example: mywebsitename.com) into this 3rd party tool and click the "DNS lookup" button (example screenshot).

Afterward, your site’s IP address should be added to the “Authorize new IP address” section (example screenshot)

Once you've completed those steps, try sending a test email from WP Mail SMTP > Tools.

If you have already tried these steps and are still getting this or any other error message, please let us know by filling out this form to create a support ticket.

Please ensure that all of your form plugins have some form of spam prevention enabled (like ReCaptcha for example), because spambots are likely targeting vulnerable forms.

Please reach out to the support team of your form plugin to confirm what methods work best. For example, WPForms has several built-in methods of mitigating spam that you can try.

If you have already tried these steps and are still having issues, please let us know by filling out this form to create a support ticket.

After purchasing a license, please ensure you have followed the steps outlined in this section of our documentation that covers our license verification process.

If you have already tried these steps and are still having issues, please let us know by filling out this form to create a support ticket.

Please note that only license holders have an account with us. An account is not created with the Lite/free versions of WP Mail SMTP.

In case it helps to know, we are currently offering a discount for the first year of any license subscription. You can find the details here

If you have an account, but you are still unable to login, please let us know by filling out this form to create a support ticket.

You can reset your password by entering your email address into our password reset form here

If you have already tried these steps and are still having issues, please let us know by filling out this form to create a support ticket.

After purchasing a license, please ensure you have followed the steps outlined in this section of our documentation that covers our license verification process.

If you have already tried these steps and are still having issues, please let us know by filling out this form to create a support ticket.

Please refer to this section of our documentation that covers our upgrade process and prorated pricing here.

If you have already tried these steps and are still having issues, please let us know by filling out this form to create a support ticket.

You can generate an invoice by following the instructions outlined in this section of our documentation.

If you have already tried these steps and are still having issues, please let us know by filling out this form to create a support ticket.