Gmail's Sifymail or Sifymail's Gmail?

Email providers differ in rendering their services. For example, with Gmail account one can send a mail content to many persons with all their mail addresses inserted in 'To' box. But with Sifymail, that is now upgraded with the same Gmail's most of apps, such sending is a limited one. Since it is a free service, it is the mail provider's choice whether to allow such sending out many mails or not. But once such sending of mails is attempted - even by mistake, the Sifymail begins not only to block next such sending but also blocks further sending of any mail from the mail account! The account holder is banned for one day; now he can receive and read mails only! Is this a sort of punishment? If it is so, instead of this, such mail providers can consider to convert their 'service' into a paid service - as email is meant for both sending and receiving only.