I get the following message sending or receiving email on Thunderbird. Sending of the message failed. An error occurred while sending mail. The mail server responded: Verification failed for <gregger@gregcpa.net> Mailbox is full / Blocks limit exceeded / Inode limit exceeded Sender verify failed. Please check the message recipient "gregger@gregcpa.net" and try again When I delete emails I highlight and then press Shift-Delete. I am asked if I want delete without saving. I say yes.