SMTP Error 552 occurs when an email message cannot be delivered because it exceeds the size limits set by the receiving mail server or because the recipient’s mailbox has reached its storage quota. This error is common when sending large attachments, images, or documents via email.
Because this is usually treated as a permanent delivery failure, the message will not be retried unless corrective action is taken. Reducing message size or ensuring adequate mailbox storage is essential to resolve this issue.
TABLE OF CONTENTS
How to Resolve SMTP Error 552
1. Check the total size of your email, including all attachments.
2. Remove large attachments and resend the email.
3. Compress files into a ZIP archive to reduce overall size.
4. Upload large files to cloud storage and include a download link instead.
5. Ask the recipient to confirm whether their mailbox is full.
6. If you manage the mailbox, increase the storage quota in cPanel if necessary.
7. Resend the email once size or storage issues are resolved.
Additional Information
- Most mail servers enforce attachment size limits, typically from 10 MB to 25 MB.
- Email attachments increase in size during encoding, which can unexpectedly push messages over the permitted limit.
- A mailbox that has reached its quota will reject all new incoming messages until space is freed.
- Repeated delivery attempts to a full mailbox may result in temporary or permanent sender blocks.
- Cloud-based file sharing is the recommended method for securely sending large files.
- Regularly monitoring mailbox usage helps prevent storage-related delivery failures.
Login to Domains.co.za Account
1. Go to the Domains.co.za website Account Login page.
2. Enter your Email and Password and click the Sign In button.
3. You will see the Domains.co.za Dashboard, displaying the Manage Account menu on the left and your Account Information, Account Overview and Open Support Tickets on the right.
