I have talked to someone in Nicaragua that uses NicaBox / TransExpress. He uses a plan with NicaBox that is not listed on their websites - it appears best to deal directly with the local offices for this information. You can get a USA mailbox and receive letters and packages for pickup in Managua or Rivas (for an extra fee). Prices seem reasonable.Â
I have also been looking at the website for USAbox.com. They scan the cover of your mail and post it online for the recipient to look at and decide to have it forwarded, stored for bulk mailing, or discarded. They can also scan the contents of a piece of mail and email the data for $10. But they use DHL for delivery, so shipping and mail costs can be rather high. They list Nica as a country that they service, but I have not talked to anyone that uses it there. But I have seen recommendations for their service in Costa Rica.