Email "Bounce Back" Error
4.5
You sent an email but received an immediate reply saying it could not be delivered.
Symptoms
- Delivery failure notice
- Error 550
- Mail returned
Possible Causes
- Inbox full
- Invalid address
- Attachment too large
Step-by-Step Fix
1
Check Recipient Address
Ensure there are no typos in the email address.
2
Reduce Attachment Size
Most servers limit attachments to 20MB-25MB.
3
Wait and Retry
If it's a temporary error (4xx), the server might be busy.
When to See a Technician
A 550 error usually means the recipient's inbox is full or the address doesn't exist.
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