Quick answer
Read/unread and flag markers help organize messages; they do not prove that another person read the mail.
Applies to
For an authorized mailbox user. Interactive Online manages settings only for mail hosted on the selected service; mail hosted elsewhere uses that provider's settings. The preserved lesson shows an earlier interface.
Steps
- Open the intended application or account and confirm its complete mailbox address and provider.
- Select the intended message and use Mark or the current read/unread/flag control. Keep deletion and spam actions separate from marking.
Check the result
Reopen the affected message, folder, contact or preference and confirm the intended result. Check delivery separately when a message was sent.
Troubleshooting and support
If a toolbar differs, check the installed Roundcube skin and permissions. For missing mail, inspect folder/search scope and server synchronization before deleting an account.
Contact support from the owning account with the domain, product/version, exact error, time/time zone and redacted evidence. Exclude credentials, session URLs, payment details and private customer records. Confirm any separate application-support scope.
Related help
- Set local or remote email routing for the correct mail provider
- Collect useful evidence when an email message is missing
Official references
Written guidance reviewed November 1, 2026. The preserved historical tutorial has not been recertified for current software.
