Mail delivery failed: returning message to sender

[Mail Delivery System]

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  info@rajeevindustries.com
    LMTP error after RCPT TO:<info@rajeevindustries.com>:
    552 5.2.2 <info@rajeevindustries.com> Mailbox is full / Blocks limit exceeded / Inode limit exceeded