Hi @Carol Edwards ,
Welcome to our forum!
It seems that you received a spam / junk mail. We highly suggest not to open the links provided as it maintain malwares that could harm your machine. Microsoft will never send you an email notification telling you that you have unreceived emails. If you suspect an email is not safe, you can adjust the settings of your junk mail filter. To do this, simply follow the steps provided on the article below:
Change the level of protection in the Junk Email Filter
Hope to help you!
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