Hallo, ich sende aus Outlook 365 eine mail zu Verwandten nach Amerika.

die Mailadresse verwende ich seit vielen Jahren und meine mailadresse ist auch seit Jahren die gleiche.

Heute bekam ich dies Antwort:

This is the mail system at host mailout09.t-online.de.

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

Please contact your Internet service provider since part of their network
is on our block list (S3140). You can also refer your provider to
http://mail.live.com/mail/troubleshooting.aspx#errors.

---

Was ist das denn?