v4.7

## BillionMail v4.7

#### Mailbox Quota Management

- Added mailbox storage quota management functionality, supporting real-time monitoring of mailbox usage. The system automatically triggers alert notifications when usage approaches the limit. Administrators can promptly track resource consumption, improving system stability and operational efficiency.

#### Bug Fixes

- Fixed an issue causing exceptions when configuration is missing in multi-IP domain scenarios.
- Fixed a password encryption issue in mail relay settings that caused test connection failures.
- Resolved a bug where domain were being duplicated when editing relay configurations.
- Fixed the issue where the newly installed Postfix fails to send emails due to the lack of necessary configuration.
- Fixed the issue where sending emails fails due to incorrect directory permissions after creating the mailbox.
- Update Roundcube image to version 1.6.11
- Fixed the issue where some APIs cannot have the authorization parameter filled in through the Swagger UI. Remove some APIs that are not enabled.
- Fixed the issue where custom attributes for Send API were not replaced.
- The front end fixes the problem of clicking to add a template without a domain name.
- Fixed the issue where the domain list certificates were displayed incorrectly.
- Fixed the issue where the certificate file was not displayed after adding the domain.
- Fixed the issue of the number of successfully sent marketing tasks being too small.
- Allow to add relay configuration without binding to a domain.