Place the peaches, lemon juice, sugar, and salt in a blender and puree until smooth. Place a fine mesh sieve over a large bowl and pour the mixture through it. Use a wooden spoon or spatula, as needed, to press the mixture through the strainer.
Transfer to your ice cream maker and process according to the manufacturer's instructions. Serve immediately for soft-serve sorbet, or transfer to an airtight container and freeze until ready to serve.