Why this matters
A mailbox login is not the same account as the hosting customer portal.
Step by step
- Identify the mailbox address and its authorised webmail instructions separately from your customer login.
- Use the verified webmail address and mailbox credentials; do not assume the portal password applies.
- Check you can read and send a test message from the correct mailbox.
Keep the result of the final check and any unresolved question with your project records.
Availability depends on the product, permissions and management agreement. Use the existing support conversation for the same issue.