Find the forwarding destination
After signing in, open “Setup” or select the mailbox under “Team settings”. Copy the displayed address in full. Every mailbox has a different destination.
Add it at your provider
The exact label varies. Look for “forwarding”, “redirect” or “routing” in the settings of your existing support address.
- Microsoft 365: Admin center → Active users → mailbox → Manage email forwarding.
- Google Workspace: Gmail settings → Forwarding and POP/IMAP → Add a forwarding address.
- IONOS: Email → select the address → Forwarding.
- Strato: Email → Administration → edit forwarding.
- all-inkl: KAS → Email → Forwarding → New forwarding rule.
Test the connection
Send the test from a different address. With Google, the confirmation code first appears as a ticket in 1stlevel.tech; copy it into Gmail and then enable forwarding.
You may keep a copy in the old mailbox. Avoid two active paths to 1stlevel.tech, as that can deliver the same request twice.