I have a contact form posting datas to https://support.zoho.com/support/WebToCase (action="..")

Everything works fine with it, even from my server. My contacts are saved.

But, I have another form posting datas to  https://crm.zoho.com/crm/WebToLeadForm.

In that case, contacts are saved if posted from my computer, in local. But if I put the form on my (same) server, nothing happens ...

Maybe Zoho server refuses posted datas from my server's IP ?

Why in one case and not another ?

And why the destinations URLs are differents ?

Thank you for your help !

Regards

EL