[U-Boot] Failed mail

postmaster at acn2.net
2009-09-30T13:38:49Z

Your message to mx2.mstelcom.net was rejected.
I said:
RCPT To:<sfcg@nexus.ao>
And mx2.mstelcom.net [41.221.254.21] responded with
550 5.1.1 <sfcg@nexus.ao>: Recipient address rejected: User unknown