# Communication in Community If you encounter any problems when using OpenHarmony, please join the email group for discussion. ## How Do I Subscribe to a Mail List? If you have never subscribed to a mail list before, follow the steps below: 1. Click the name of the mail list that you want to subscribe to. 2. Wait until the browser goes to the subscription page of the mail list, which provides instructions on how to subscribe. 3. Read the subscription instructions and provide an email address that you want to use to subscribe to the mail list. 4. Enter your email address and click **Subscribe**. You will receive an email asking you to confirm the subscription. 5. Reply the email to confirm your subscription. 6. At last, you will receive a welcome email from the email list. **Table 1** Email list

Email Address	Introduction	Description
contact@openharmony.io	Public mailbox	Public mailbox of the OpenHarmony community. You can send emails to this mailbox to sign the Contributor License Agreement (CLA).
dev@openharmony.io	Development mail list	OpenHarmony community development discussion group. Any topics related to community development can be discussed here. Any one can subscribe to it.
cicd@openharmony.io	CI mail list	The OpenHarmony community CI/CD builds a mail list that any developer can subscribe to.
pmc@openharmony.io	PMC mail list	Mail list for PMC discussion. It can be subscribed to by PMC members.
scy@openharmony.io	Mail list for security issues	Email address for you to report OpenHarmony security issues.
scy-priv@openharmony.io	Security group mail list	The security group members can subscribe to this email list to discuss security issues.

## How Do I Send Emails to a Mail List? To send an email to a specified mail list, send your email to the address listed in the table above. In this way, all community members in this mail list will receive your email.