Email wird nicht zugestellt

Question

Ich habe ein Problem mit der Zustellung einiger emails, bis jetzt 2 Adressen. Meldung sagt: I'am sorry to have to inform you that your message could not be delivered to one or more recipients...... For further assistance please send mail to postmaster....the mail system.Das Problem ich kann niemand erreichen der mir eine Contactperson /Adresse mitteilt an dem ich mich wenden kann. Wo finde ich den Postmaster???? This is the mail system at host mailout02.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 <>: host    hotmail-com.olc.protection.outlook.com[104.47.10.33] said: 550 5.7.1    Unfortunately, messages from [194.25.134.17] 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.    [DB5EUR03FT046.eop-EUR03.prod.protection.outlook.com] (in reply to MAIL    FROM

jojo1 · Accepted Answer

@Stick_1, siehe mal z.B. hier:https://telekomhilft.telekom.de/t5/E-Mail-Programme/T-online-E-Mails-werden-von-Hotmail-abgewiesen/td-p/4142725

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