The mailing module has been optimized and redesigned to support large mass-mailings. This was achieved by introducing the option allowing to configure the number of threads used to handle the mailing. Thanks to this, it is possible to send a large number of invitations (about 50 thousand of e-mails).

In order to adapt the server to mass mailing, it should be properly configured so as to specify the right number of mailing threads. For more information see: here.