"Mail Service Suspended" What's up with that?

My closest friend and I are religious about sending letters to Paul each week. Getting letters is just fun. Last night she called to let me know her recent letters were returned with a note stating mail service to Samoa has been suspended. She went to the Post Office and they confirmed it, pulling up the area on their screen showing it all blacked out. No explanation was given. I Googled the subject but came up empty handed. So what's that about? I hope the package I just mailed is not stuck in limbo.