Blockchain message

I have no idea whats going on here,is this some type of virus? I keep getting this message but i`m still able to send and receive emails.
email addy
[SMTP]#Cannot Send Message(Sending email"Re Blockchain :Your Online Access Is Temporarily Locked [#34319"
Failed With Error"Email Recipient Not Accepted By Theb Server.)

Edit Item Ignore Copy To Clipboard

It means the address you have sent the email to is not accepted by your email provider.

You can click on the Edit Item option, correct the address, then send it.

Or if you want to delete it, click on Edit Item, then use Menu > Message > Delete.

Thank you mate,so simple,so simple i didn`t think of it.