keine e-mail-verbindung

hallo,
leider kann ich von dieser e-mail-adresse keine mails empfangen: vrbolli@hotmail.com.
der absender erhält jedesmal folgende fehlermeldung:
Dies ist eine automatisch generierte Nachricht.

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Die folgende(n) Adresse(n) schlugen fehl:

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andere e-mail-adressen funktionieren wunderbar, sowohl beim absender wie bei mir auf meiner e-mail-adresse: mi.bo@utanet.at
ich wäre sehr dankbar, wenn mir jemand helfen könnte!
besten dank
michaela