Mails von t-online an hotmail.com werden nicht zugestellt (Undelivered Mail Returned to Sender)

6 years ago

Wenn ich mit Absender @wafel Mails an Adressen @hotmail.com schicken will, werden sie nicht zugestellt (Undelivered Mail Returned to Sender) mit folgendem Hinweis:

 

hotmail-com.olc.protection.outlook.com[104.47.66.33] said: 550 5.7.1
Unfortunately, messages from [194.25.134.18] 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.

 

Je nachdem tauchen neben der o. g. IP-Adresse 194.25.134.18 auch andere auf, die jeweils zu Hosts mailout00.t-online.de ... mailout13.t-online.de gehören.
Bitte sorgen Sie umgehend dafür, dass ALLE IP-Adressen von T-Online-Mailservern in die entsprechenden Whitelists des Betreibers von hotmail.com eingetragen werden.

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