Step 1:Log into your Mailforge account.
Step 2: Go to the Mailbox tab in Mailforge, near the top of the screen you will seen an export tab.
Step 3: Click on Export to other
Step 4: Choose export to Instantly from drop down menu
Step 5: This will download a CSV file for you to upload into Instantly
Step 6: Upload the CSV file to Instantly by going to Email Accounts - Add New - Any Provider -Bulk Import from CSV