[horde] Mailer SMTP Config with Gmail or Yahoo

[cdj at deskservice.com]

  Hello, 
someone can tell me why if i try to configure gmail (allow access to  
low security set) or yahoo smtp in MAILER tab of horde they always  
denied authentication? 
Tried 465 SSL or 587 TLS, nothing changed.
Obviously account and password if logged unchecked.
I need an external smtp for 30 mailbox with absolutely normal  
traffic... and can't understand why turbosmtp denied me sign up....
Someone has another free working smtp with horde? 

  No way to debug it, in log always present only "server denied  
authentication"...

Thanks a lot for helping

Dario Cdj