Seit einigenWochen versuche ich von @t-online.de an Email Adressen bei @Outlook.com oder @Outlook.de zu schicken.

Meistens kommen sie mit dieser Fehlermdlung zurück, machmals gehen sie durch, aber nicht klar nach welcher Logik.

Danke für die Hilfe.

_____________________

This is the mail system at host mailout08.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

<xxxxxxx@outlook.de>: host eur.olc.protection.outlook.com[xxx.xx.x.xx]

    said: 550 5.7.1 Unfortunately, messages from [194.xx.xxx.xx] weren't sent.

    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.

    [VE1EUR03FT041.eop-EUR03.prod.protection.outlook.com] (in reply to MAIL

    FROM command)