Email send to a user with t-online.de address

[cDGo]

On a shared hosting server, one of the users is sending an email to a receiver with a @t-online.de address and got the email bounced back to them, with this message:
H=mx01.t-online.de [194.25.134.72]: SMTP error from remote mail server after initial connection: 554 IP=xxx.xxx.xxx.xxx - None/bad reputation. Ask your postmaster for help or to contact [email protected] for reset. (NOWL)

After contacting them, we get a reply that the server IP where the email is send from needs to have a link or redirect to a website which has to show direct contact data of the person responsible for e-mail sent from that system.

so that would mean that when you enter the servers IP adres in the browser, there should be a page presented with the servers owner / contact information.

They say its for:
(*) In case of a malfunction e-mail is not available. Therefore an e-mail address in the system's domain is not suitable for "quick" electronic contact with the person responsible for sending e-mails from this system.

Which ofcourse is a good thing (I think).

I know that when you enter the servers IP, you get a page telling you that "webserver is functioning normally".
Could this page be abused for showing the server owners contact information?
Or is there a beter way of doing it?
Any thoughts about this?
Either a solution or warning against to actually comply?

 

[zEitEr]

Hello,

The default page is located under /var/www/html/index.html and you are free to update the page to redirect and/or show any contact information. Directadmin won't rewrite the page. Of course publicly available contacts can be abused.

You might check this page:

- https://postmaster.t-online.de/index.en.html#t3

including the section "4.12 Reputation management".

Probably it would help.

I know that when you enter the servers IP, you get a page telling you that "webserver is functioning normally".