Shipito might be another option for mail forwarding, depending on your volume. They mainly deal with packages but can do letters as well. They have warehouses in LA, Oregon, Nevada and Austria (the country).
https://www.shipito.com/faq#mail
Fees are:
Receiving mail:
Free receipt of mail and scan of the envelope.
$2 to open and scan each letter (optional). You can choose to scan individual letters of make it automatic.
Mail forwarding (optional. Each letter will be held for 180 days and then discarded if you don't forward them):
$2 per letter processing fee
They offer a range of courier and postal services.
Consolidation (optional):
$120 per year membership fee if you would like the option of consolidating multiple letters into one bulk-mailing package
$3 per letter consolidated into a bulk envelope/package
You can choose individual letters for consolidation. Others can wait in the warehouse for up to 180 days, then they will be discarded fee-free.
https://www.shipito.com/faq#mail
Fees are:
Receiving mail:
Free receipt of mail and scan of the envelope.
$2 to open and scan each letter (optional). You can choose to scan individual letters of make it automatic.
Mail forwarding (optional. Each letter will be held for 180 days and then discarded if you don't forward them):
$2 per letter processing fee
They offer a range of courier and postal services.
Consolidation (optional):
$120 per year membership fee if you would like the option of consolidating multiple letters into one bulk-mailing package
$3 per letter consolidated into a bulk envelope/package
You can choose individual letters for consolidation. Others can wait in the warehouse for up to 180 days, then they will be discarded fee-free.