It means nothing of the kind. It does mean that there was a problem trying to deliver the message, the recipient server has rejected the message, that means that the sending server will try to deliver the message for up-to five day then fail and at that point you should receive a failure notice. This is all normal mail server delivery routines.
Originally Posted by PlanoFuji
FWIW, the mail server for that company is still there and accepting connections (see below):
The only thing I can suggest is to check that you have sent the email to the correct address and if it's wrong then send another email to the correct address.
telnet mail.soundryder.com 25
Connected to mail.soundryder.com.
Escape character is '^]'.
220-advanced1229.inmotionhosting.com ESMTP Exim 4.80 #2 Fri, 12 Jul 2013 10:33:42 -0700
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
250-advanced1229.inmotionhosting.com Hello mail.somedomain.com [18.104.22.168]
250-AUTH PLAIN LOGIN