Getting messages about bounced emails that are not correct

Hello, I just launched admin console and the message from Freehost indicated that Nancy Tinari email ( Nancy_Tinari@yahoo.com) was bouncing back too many times.  I contacted Nancy and she is not having any issues getting or using the group email for our club and I have never got a message inidicating that her email bounced back . I get an error message that Kirsten Anderson's ( KirstyKat@shaw.ca) email is bouncing back and I have contacted her and now removed her email from our member's list but this isn't indicated on the message from Freehost.  Something isn't working right.  Just to let you know.

Andrea Maudsley,
VP Education,
Rocky Point Toastmasters ( 7743)

The Bounce Count for Email Address [Nancy_Tinari@yahoo.com] has been reset to zero.

The Bounce Count for Email Address [KirstyKat@shaw.ca] has been reset to zero.