The additional settings for the sms_option file are:
! So that we don’t add text to the body of the SMS message FROM_FORMAT= SUBJECT_FORMAT= CONTENT_PREFIX=
Without these settings, an email containing:
user@domain.com (Sample subject) Sample text
would get converted into the SMS message:
From:user@domain.com Subject:Sample Subject Msg:Sample text
That, in turn, would not be in the format expected by the mobile-to-email code, which wants to see:
user@domain.com (Sample subject) Sample text
Hence the need (for loopback testing) to specify empty strings for the FROM_FORMAT, SUBJECT_FORMAT, and CONTENT_PREFIX options.
Send test email messages addressed to 000@sms.domain.com, such as:
user@domain.com (Test message) This is a test message which should loop back
The result is that this email message should be routed back to the email recipient user@domain.com.Be sure to have added sms.domain.com to your DNS or host tables for the test.