Thank you for contributing to Gomail! Here are a few guidelines:
If you think you found a bug, create an issue and supply the minimum amount of code triggering the bug so it can be reproduced.
If you want to fix a bug, you can send a pull request. It should contains a new test or update an existing one to cover that bug.
If you think Gomail lacks a feature, you can open an issue or send a pull request. I want to keep Gomail code and API as simple as possible so please describe your needs so we can discuss whether this feature should be added to Gomail or not.