Hi,
Have u tried setting below property to false.
company.security.strangers.verify=false

Hi Mohamed,
Thx for your reply!

I added the line you mention in the  portal-ext.properties under the Liferary 7.3.0 home folder, But we still have the same problem.
I think there is a code condition on the emailAddress if it contains the @no-emailaddress.com the portal will redirect me to this verification page ( see attached image).
You can remark that the url contains at the end /c and this is not correct.
Also if I choose a new email @ nothing is happen when clicking on " Enregistrer" , The console looks fine and displays all the logs like in the normal case, and also the Landing-page class responsible for the postLogin is also invoked well.

My aim now is to find the condition that prevent the users with this suffix to enter to the portal by looking for the AuthenticatedSessionManager's login method code source because I'm using the

_authenticatedSessionManager.login( httpServletRequest, httpServletResponse, login, password, rememberMe, authType);    to authenticate the user with those params

I injected it like that in customLoginMVCActionCommand class

@Reference
        private AuthenticatedSessionManager _authenticatedSessionManager;

for now I'm checking this  AuthenticatedSessionManagerImpl bexcause it contains the source code of the login method

https://github.com/liferay/liferay-portal/blob/master/portal impl/src/com/liferay/portal/security/auth/session/AuthenticatedSessionManagerImpl.java#L253
Am I in the right path ? Otherwise, any new ideas are appreciated.
Thanks

Hello Mohamed,
Thank you for your recommendation and your help, I found another solution by setting a property in portal-ext.properties , I will Share it here maybe it could help someone else, 

Solution:  Liferay generate automatically email address for users that does not have  email address So here Liferay will generate email address like userId@Suffix which suffix here is already set up in the users.email.address.auto.suffix=Suffix

So In my case I tried to sign in to the portal with a user that does not has an email address so that's why Liferay pushed me to enter an email address before logging in because it the emailAddress is required,

So to resolve this I added this property to the portal-ext.properties : users.email.address.required=false   and the problem get resolved and could access to my Portal now. 
The final solution is to add those line in the portal-ext.properties: 

users.email.address.required=false
users.email.address.auto.suffix=@no-emailaddress.com
users.email.address.generator=com.liferay.portal.security.auth.DefaultEmailAddressGenerator

Regards,
​​​​​​​Majdi