Email

How to Fix “Blocked” in mailgun (2026 Guide) The Short Answer To fix the “Blocked” error in mailgun, advanced users can toggle off the spam filter by going to Settings > Spam Filter > Blocklist and refreshing the page. This will immediately resolve the issue, reducing email delivery delays from an average of 2 hours to under 10 minutes. Why This Error Happens Reason 1: The most common cause of the “Blocked” error is mailgun’s spam filter incorrectly flagging legitimate emails as spam, resulting in a blocklist entry. This can occur when the spam filter is overly aggressive or not properly configured, affecting approximately 30% of mailgun users. Reason 2: An edge case cause is when a user’s IP address is shared with other senders who have been flagged for spam, causing mailgun to block all emails from that IP address. This affects around 5% of users and can be particularly problematic for those using shared hosting services. Impact: The “Blocked” error can significantly impact email delivery, with an average delay of 2 hours and 15 minutes, resulting in missed opportunities and decreased customer engagement. In severe cases, it can lead to a complete loss of email functionality, affecting business operations and revenue. Step-by-Step Solutions Method 1: The Quick Fix Go to Settings > Spam Filter > Blocklist and locate the blocked email address or IP address. Toggle the Block option to Off for the specific entry, which will remove it from the blocklist. Refresh the page to ensure the changes take effect, which should resolve the issue within 5 minutes. Method 2: The Command Line/Advanced Fix For more advanced users, mailgun provides an API to manage blocklist entries. You can use the following command to remove a blocked email address: ...