Comment by reaperducer

ask USPS to do a 301 Moved Permanently or 308 Permanent Redirect.

The USPS doesn't honor either 301 or 308. As someone who moves just about every year, and fills out the paperwork to get my 301s and 308s for free, instead of paying a third-party service, I can tell you that the 301/308 at USPS is only good for one year.

To get around this, I used to use a 305: Use Proxy, but then my UPS Store of choice closed, and I was back to 301/308 land.