Quick answer
Choose Compose in Roundcube, review the complete recipients and attachments, then send. A Sent copy alone does not prove delivery to the destination.
Applies to
For the correct mailbox in Roundcube webmail on an email-enabled Interactive Online service. Open it through cPanel Email Accounts > Check Email or the trusted webmail link. Skin, version and provider settings can change labels.
Steps
- Open Compose and enter To, subject and the message. Review autocomplete matches.
- Add Cc/Bcc only as needed, and attach the intended files. Wait for attachment uploads to finish.
- Confirm the From identity and recipient list, then choose Send when ready.
Check the result
Check Sent, any failure notice and receipt at a controlled test destination.
Troubleshooting and support
If sending fails, record the exact error and time. Check attachment size, mailbox storage and sender authorization without exposing the message contents.
If the problem continues, contact support from the account that owns the service. Include the domain, exact error, time and time zone, tool name, and a redacted screenshot. Keep passwords, private keys, cookies and private message content out of the ticket.
Video tutorial
The original video is preserved. Its interface or product version may differ from the written guidance above.
Related help
Official references
Written content reviewed November 1, 2026. Menu availability depends on the product version, permissions and service.