Mail Delivery System <MAILER-DAEMON@mx.main-hosting.eu>
4:16 AM (10 hours ago)

to me
This is the mail system at host mx.main-hosting.eu.

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 mail system

<tesstt1221@hotmail.com> (expanded from <yenisi@bitap.net>): host
    mx4.hotmail.com[134.170.2.199] said: 550 SC-001 (BLU004-MC1F24)
    Unfortunately, messages from 185.28.20.252 weren't sent. Please contact
    your Internet service provider since part of their network is on our block
    list. You can also refer your provider to
    http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL
    FROM command)

Final-Recipient: rfc822; tesstt1221@hotmail.com
Original-Recipient: rfc822;yenisi@bitap.net
Action: failed
Status: 5.0.0
Remote-MTA: dns; mx4.hotmail.com
Diagnostic-Code: smtp; 550 SC-001 (BLU004-MC1F24) Unfortunately, messages from
    185.28.20.252 weren't sent. Please contact your Internet service provider
    since part of their network is on our block list. You can also refer your
    provider to http://mail.live.com/mail/troubleshooting.aspx#errors.