mailer-daemon: part of Telekom network is on our block list

[geodéta legény]

Helló!

Szóval hotmailes emailre írva ezt dobja vissza a mailer-daemon:
(egy időben yahoos emailre nem tudtunk írni emiatt)

<k******@hotmail.com>: host
    hotmail-com.olc.protection.outlook.com[104.47.73.161] said: 550 5.7.1
    Unfortunately, messages from [195.228.240.51] 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.
    [MW2NAM04FT059.eop-NAM04.prod.protection.outlook.com
    2023-07-13T09:02:44.523Z 08DB8359ACD681D3] (in reply to MAIL FROM command)