Mailjet processes and sends tens of thousands of emails at lightning speed, but for an email to be marked as 'delivered,' it must first be accepted by the recipient's server. If your emails are marked as 'sent' but not yet 'delivered,' it could be for a number of reasons. Here are some common causes and practical steps to help you troubleshoot.
Why Are My Emails Stuck on 'Sent'?
If your emails are showing as 'sent' for a longer period (e.g., more than a few minutes), consider these possibilities:
1. Recipient Server Issues
- Groups of Similar Email Addresses Queued: If many of your emails to a specific domain (e.g., all emails to @XYZ.com) are marked as 'sent,' the recipient's server might be temporarily unreachable. In these cases, Mailjet will automatically retry until the email is either successfully delivered or ends up with a 'soft bounce' status.
- Individual Addresses Queued: If an individual email is stuck as 'sent,' the recipient's inbox could be full or currently unreachable. Mailjet will continue to retry for a period of time to achieve delivery.
2. Possible Syntax Errors
- Typos in Email Addresses: Double-check the email addresses for typos or syntax errors, such as double '@' symbols (e.g., tom@@xyz.com). These errors can prevent successful delivery.
3. Mailjet System Status
- Check the Mailjet Status Page: There might be a temporary issue or update that affects email delivery. Visit the Mailjet Status Page for real-time updates, and consider subscribing to receive notifications.
4. Free Plan Limitation
- Daily Sending Limit: If you're using the Free Plan, you can only send up to 200 emails per day. If you've exceeded this limit, further emails will be held back. To remove this limitation, consider upgrading to a paid plan.
Understanding Throttling
Sometimes, recipient servers or ISPs may slow down ('throttle') the processing of incoming emails. This throttling helps them manage incoming traffic and protect their systems. During this period, your emails will be marked as 'pending' (or 'sent') until they can be processed.
What can you do? Unfortunately, throttling is controlled entirely by the recipient's server, and there's nothing you can do directly to change this. However, Mailjet ensures compliance with throttling rules to avoid overwhelming the recipient server, which could otherwise result in emails being delivered to the junk folder.
Need More Help?
If you have further questions or concerns about your 'sent' emails, our Support Team is here to help. Don’t hesitate to reach out—we’re committed to helping you succeed with Mailjet.