newsletter problem

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The email program

<blabla@blabla.bla>: Host or domain name not found. Name service error for
name=blabla.bla type=A: Host not found

<goran_g@hotlinemail.com>: host sitemail.everyone.net[216.200.145.235] said:
550 Recipient Rejected: Account Inactive (in reply to RCPT TO command)


Final-Recipient: rfc822; mario.ceprnja4@hotmail.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-email; host mx3.hotmail.com[65.54.245.72] said: 550
Requested action not taken: mailbox unavailable (in reply to RCPT TO
command)

Final-Recipient: rfc822; mario.ceprnja@hotmail.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-email; host mx3.hotmail.com[65.54.245.72] said: 550
Requested action not taken: mailbox unavailable (in reply to RCPT TO
command)
...