E-mail to SMS setup
This guide gives information about how to setup the built in email server
(SMTP server) of Ozeki NG SMS Gateway to be able to do e-mail to SMS
forwarding. This solution is ideal if you want to send SMS to mobile
phones and you use e-mail.
Introduction
To create e-mail to SMS forwarding you have three options. All three options have
advantages and drawbacks, so it is up to you which is more appropriate for your
system.
Option 1 - E-mail to SMS forwarding using a direct SMTP connection to the built
in SMTP server
You can configure the built in SMTP
server of Ozeki NG SMS Gateway to have e-mail to SMS forwarding.
If the SMTP server is enabled it will accept e-mail messages. These messages can
be sent to the an e-mail address that contains the phone number. For example,
you can send an e-mail to +441234567@192.168.0.10, where +441234657 is the
phone number and 192.168.0.10 is the IP address of the SMS gateway (Figure 1).
The subject of the email and the
body of the e-mail can contain text that will be sent as an SMS message to the
+441234657 phone number.
To get this configuration working you need to configure 192.168.0.10 as the SMTP
server for the computer that sends the e-mail (192.168.0.11).
Figure 1 - E-mail to SMS forwarding using a direct mail relay
The advantage to this approach is it's simplicity. The drawback is that your
computer that sends the alert (192.168.0.11), will not be able to send e-mail
messages that are should not be sent as SMS, because the built in SMTP server
of Ozeki NG will not forward e-mail to other mail servers.
Option 2 - E-mail to SMS forwarding through a corporate SMTP server
The second option is to use your company mail server (mail.company.com) to accept
e-mail messages from your computer (192.168.0.11) and to forward e-mail messages
that should be sent as SMS to the built in SMTP server of Ozeki NG SMS Gateway
(Figure 2).
The configuration of this approach is similar to the configuration of the
previous option. All you have to do is enable the built SMTP server for
E-mail to SMS forwarding
in Ozeki NG SMS Gateway.
In this case you will also send messages in the format +441234657@sms.company.com,
and the subject and body of the e-mail messages will be sent as SMS to the
phone number +441234657. The difference in settings is that in your computer
(192.168.0.11) you will have to configure your company mail server as the SMTP
server.
If you use this configuration, you have to create a DNS entry that points
to your SMS Gateway. The DNS entry can look like this: (sms.company.com ->
192.168.0.10).
The reason you need, this is because most company e-mail relays will not forward
e-mail messages to IP addresses. This means, that the +441234567@192.168.0.10
will
not be a valid address, you have to use +441234567@sms.company.com instead.
Figure 2 - E-mail to SMS forwarding using the corporate mail relay
The advantage to this solution is that it allows you computer (192.168.0.11) to
send both standard e-mail messages and e-mail messages intended to be sent as
SMS at the same time. Your company e-mail server will relay the e-mail messages
to the sms gateway or to the e-mail destination without any configuration. The
disadvantage is that it requires a DNS setting to point to your SMS gateway.
Option 3 - E-mail to SMS forwarding using a POP3 client connection and a
dedicated POP3 mailbox
The third option is to setup an POP3 mailbox on the company mail server and
configure the Ozeki Software to download the new messages from this mailbox
periodically and send the downloaded messages in e-mail (Figure 3).
If you go with this option, you will send your e-mail messages to the same
address e.g.: john@mail.company.com and you will put the mobile telephone number
into
the subject line of the e-mail. In this case the body of the e-mail message will
be sent to the telephone number in the subject line as an SMS message.
To configure this solution you need to
setup an e-mail user in Ozeki NG SMS Gateway that will do the periodic
downloads. During the configuration
make sure, that the e-mail user deletes the downloaded messages, so they will
not be sent more then once.
Figure 3 - E-mail to SMS forwarding using a POP3 mailbox
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