discontinue Blackberry failure notices after switching to iPhone

[Hilly]

I recently switched from a Blackberry to an iPhone.  Now anyone who emails me at my optonline or Yahoo address gets a notice from Blackberry that the email has not gone through.  The message has gone through to the basic address and to my iPhone, but the sender is confused.  How can I get Blackberry to recognize that I am no longer a user and discontinue these messages.  Thank you.

HS

[SydneyK]

Try deleting your email accounts from the BIS server here: https://bis.na.blackberry.com/html?brand=vzw

[Hilly]

thank you

hs