Methods and systems of connectivity for forwarding an e-mail message from an e-mail server to a mobile terminal having an e-mail address under the e-mail server are provided. An e-mail address may be associated with a permanent identifier and encryption information of the mobile terminal. After receipt of an e-mail message addressed using the e-mail address from the e-mail server, the e-mail message may be encrypted using the stored encryption information. The mobile terminal may be identified using the association between the e-mail address and the permanent identifier of the mobile terminal. The e-mail message may then be provided to a messaging center for forwarding to the identified mobile terminal. The mobile terminal can decrypt and/or unpack the message using the encryption information.