You should connect your email to reduce the likelihood of your forum emails being marked as spam by email providers.

If a company or school email system is flagging your forum's emails as suspicious or phishing, see Preventing forum emails from being flagged as suspicious or phishing for the full checklist.

Company and school email systems

Corporate and university mail systems filter bulk mail silently as well. They hold the message in a quarantine without bouncing it, so it never reaches the inbox or the spam folder and your email history still shows it as sent. Ask the recipient's IT administrator to check the quarantine for the message. Checking the email quarantine on popular email systems covers Microsoft 365, Google Workspace, Proofpoint, Mimecast, and Barracuda.

In Gmail, forum emails can also land in the Updates or Promotions category tabs instead of the inbox. Changing which Gmail category/tab emails appear in explains how members can move them back.

Forum administrators: if the same thing is happening for several recipients, the root cause is usually incomplete authorization on your own domain. Check the green check marks on the Notifications Settings page, and follow Why isn't a member receiving our forum emails? (debugging guide) if you are not sure where to start.

When a user marks an email as spam, it trains the email provider (like Gmail) to automatically classify future similar emails as spam for everyone using that email provider. You should ensure that users only receive email that they recognize and expect so that they don't mark emails as spam. Users should mark the email as "Not Spam" to train the email provider to not identify those emails as spam.

We take our email reputation extremely seriously. We have taken many steps to ensure that emails sent by your forum are not treated as spam by any email providers. Reports from all major spam blacklists show that Website Toolbox is not listed in any blacklist. We include one-click unsubscribe links in all emails and use the latest email security standards, such as DMARC and SPF, to ensure that all email is successfully delivered.

You can also contact us so that we can check our email server logs to investigate the situation further. Please mention the username or email address of the user that is not able to receive the email.