Now SMS/MMS Gateway v5.0 http://www.nowsms.com

If an address is not listed on the “Blocked” list, and an “Allowed” list is not
defined, the web interface can be used to submit an SMS message from that
address.
If an address is not listed on the “Blocked” list, and an “Allowed” list is
defined, access will be denied if the address is not included in the “Allowed”
list.
To add addresses to either list, enter an address in the appropriate text edit
area and press the “Add” button. To remove an address from either list,
highlight the appropriate address in the list, and press the “Remove” button.
Wildcards can be used in a defined IP address to specify that any value in that
portion of the IP address will be considered a match. (For example,
192.168.1.* would be considered a match with both 192.168.1.1 and
192.168.1.100.)
Defining SMS User Accounts
The “SMS Users” tab of the configuration dialog defines user accounts that are
allowed to submit SMS and MMS messages through the gateway. Messages can
be submitted to the gateway via HTTP (web interface), SMPP and/or SMTP (email).
(Note: Mobile phone users that connect to the MMSC to send and receive MMS
messages are configured under the “MMSC Users” dialog tab.)
When SMS user accounts are defined to the gateway, it is possible to define
limits on the number of messages that an account is allowed to submit per day,
and per month. It is also possible to define how the account is allowed to
connect to the gateway, that is to say whether the account can login via HTTP,
SMPP and/or SMTP.
The “SMS Users” dialog tab lists defined user accounts.
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