Issues with outlook?! Cannot send test message hello message 504.5.5.2

[someonesusername]

My YunoHost server

Hardware: AMD 64
YunoHost version: 4.2.8 (stable).
I have access to my server : Yes

Description of my issue

I never had any issues setting up a mail account using my Yuno server, but in outlook I get.
i’ve set everything according to Configuring email client | Yunohost Documentation
Ports and things, still get this error:

Any help please thanks!

[jarod5001]

Can you please translate the error message?
Searched error 504, found that it’s the smtp server name :

Error 504 5.5.2

[someonesusername]

I know right that’s what I thought, that’s why I said never had any issue on any device except this time with lookout!

[someonesusername]

Meh i was to fast again, should have waited for the DNS records to do its thing…