The present disclosure relates to a communication server and a method for secured transmission of messages from an enterprise server to a telecom server for delivering to end users. The enterprise server comprises a first gateway hosted therein to encrypt and transmit the encrypted messages to the communication server. The communication server receives and pushes the encrypted messages to the end users through the telecom server. The telecom server comprises a second gateway hosted therein to retrieve the push messages and to determine capability of decryption at user devices.