If you find that you are sending emails out from your server that have all of their links replaced with a url at the redirect-url.email domain, you may have questions.
When did search become useless?
If you try searching for it right now, you will get a lot of incorrect information or even the Google "AI Overview" will spout various answers depending on how you ask it.
If you ask it one way, you will get something about how this is a placeholder and then an overview about how HTTP rewrites and redirects work. This is of course wrong.
Additionally (depending on how you ask) the overview may indicate that it is used in spam and phishing. Confidence dissolving nonsense that might cause minor (or major) panic. (You are the one sending it, so have you been compromised?!)
This includes linked pages returned by the search that pull you different directions but never towards the actual answer.
I actually encourage you to try this. Search the web to try to find out what this domain is, why it has taken over your links and what you can do about it.
I'll wait...
How to track it down?
But if you use a DNS tool you will find that it is actually Odoo S.A. itself.
dig ns redirect-url.email
results in
redirect-url.email. 600 IN NS ns3.odoo.com.
redirect-url.email. 600 IN NS ns0.odoo.com.
redirect-url.email. 600 IN NS ns2.odoo.com.
redirect-url.email. 600 IN NS ns1.odoo.com.
If you start including the name Odoo along with your search you might run into claims that this is only for marketing emails and a way to disable it. This is of course also wrong, because you know this shows up on links you're sending through Odoo, but not the marketing type.
So what are you to do? Well, search through the code base of course and find the magic system parameter that controls this behavior.
You just want the solution!
If you want to disable this, and stop sending click tracking information straight to Odoo... simply add a system parameter with the key mail_mobile.disable_redirect_firebase_dynamic_link and the value 1 or True ... actually practically any value at all given how these things are checked!
You still have questions? I do, mainly why Odoo's privacy disclosures do not seem to mention this behavior. Please let me know if you ever find out!