Have you accidently put them in your blocked senders list? Or perhaps they've accidently put you in theirs. Open messenger and go to tools/options then click on the Privacy tab and take a look through the Block List which appears on the right to make sure.
Colin Brown WL MVP
"Sylvanis" <Sylvanis[ at ]discussions.microsoft.com> wrote in message news:72080E64-8198-4154-9165-0553FAF92283[ at ]microsoft.com...
[Quoted Text] > I was messaging one contact fine and suddenly I cannot send or receive > anything from them. I keep getting the "cannot be sent to all contacts" > message. I restarted my computer and tried again and no luck. I could > send > messages to other contacts though. Any suggestions as to why this would > happen?
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