Doing mass mailing, but the letters do not reach the recipients? If You are familiar with this situation, there is a solution! ATTENTION: 1. The recommended deadline for raising the inbox of your SMTP server from 7 days (postmaster.mail.ru)! 2. Service is relevant only for "postmaster.mail.ru" as for the new SMTP servers and the old SMTP servers, maybe the usual replacement of old SMTP servers on the new SMTP server does not solve the problem!