Auto-forwarding from Namecheap
Open up your mailbox under Manage > Mailboxes. Here select the Connection Settings on the left menu.
On the Connection Settings page, click on the Incoming tab, and you'll see the unique identifier address which is your forwarding alias. Copy it to your clipboard and head over to Namecheap.
When viewing your dashboard, click on Domain List in the left-hand sidebar.
Click on the domain you'd like to modify and click on the grey Manage button.
Scroll down to the Redirect Email section, and click on the red Add Forwarder button.
Paste your alias into the Alias field, and the HelpNinja forwarding address into the Forward To field. Then, click the green checkmark to save your changes.