The reason I don’t use Yahoo Mail for daily life is that I can’t check Yahoo Mail by POP and SMTP protocol. Yahoo Mail just provides this service for plus users.

But when I am trying to use GMX as my Email, I found that I can add Yahoo Mail account into my GMX Mail Collector. GMX Mail Colletor is using POP and SMTP to check Yahoo Mail.

Why can I check Yahoo Mail in GMX using POP and SMTP? Is Yahoo Mail providing POP and SMTP services for free users?