This thread is resolved. Here is a description of the problem and solution.
The problem: The user wants to translate emails (subject, message, footer email) of WP-Members plugin. They do not appear in String Translation for translating.
The solution: These options are saved in the wp_options table.
When themes and plugins use get_option, they read values from the wp_options table. WPML can filter these calls and provide translation to the values of these options.
To let WPML know these options, themes/plugins need have a config file wpml-config.xml . This file is explained in detail in http://wpml.org/documentation/support/language-configuration-files/ , section "4. Admin texts / wp_options".
In this specific case, you can create this file wpml-config.xml with the content http://pastebin.com/nvq9Nbuy and put it in the folder of plugin wp-members.
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