Helpdesk users can receive notifications about events in Helpdesk issues. Notifications include links on Helpdesk issues and attachments which can be uploaded without login JIRA.

We recommend  to set Jira's project notification scheme to None and use only notification scheme in Helpdesk Notifications settings with "Use Jira project notifications for Jira users" enabled to send Jira notifications to Jira users and HelpDesk notifications to HelpDesk users.

Otherwise you can set 2 different Notifications schema for your HD projects: 

• One schema for assignees  and other JIRA users excluding Reporters (with JIRA links) - as a ususal project notification schema  (see  JIRA Notification Scheme ). Exclude Reporters  from that schema.
• One schema for HelpDesk users with HD links  - you need to create a separate Notification schema for Reporters and set it in Helpdesk Notifications settings. In case that Reportes in your HelpDesk project may include both HD users and JIRA users use a setting "Send standart Jira messages to common jira users
". With this setting JIRA user Reportes will recieve JIRA links and not JIRA user Reporters will recieve HD links.

Please notice that if one project is used for both JIRA-users and HelpDesk-users with two notification schemes (JIRA and HelpDesk), then try to avoid including one receiver in both of them. In this case one person will receive two notifications: one from JIRA and another from HelpDesk. If you need just notifications from HelpDesk then you can disable JIRA's notifications scheme associated to the same project.