Yes, you can email your proposal to business@gate.io, but it is also important to consider other methods of communication that may be more effective. For example, if you need a quick response, texting or direct messaging in a platform such as Slack or Discord may be better options. Additionally, if the proposal is more complex, it may be beneficial to set up a video call to discuss the details. Ultimately, it is important to choose the communication method that is most appropriate for the situation.