Please send your Pull Requests (PRs) via GitHub - https://github.com/Zimbra.
If you are sending a Pull Request for the first time, the PR process on GitHub will automatically ask you to digitally confirm the CLA (Contributor License Agreement). You can preview the CLA here: https://cla-assistant.io/Zimbra/zm-web-client.
Access to source code: https://github.com/Zimbra/zm-build