Shamim's Plugins

I am really sorry, I did not receive your email (still now).

This is very strange and i can not think how it can be possible that only one role work and more than one role not working as it saves as array and array elements can be any number.

Please let me know your WordPress version. Also please send me screenshot of Dashboard > Front End PM PRO > Settings > Emails page.

Also please Note: Announcement emails send by wp cron, so if cron can not run (eg. no visitor in your website ), no emails will be sent.

Please go to Dashboard > Front End PM PRO > Recipient > Message Type and change to “Same Message”
It will solve the issue.
Seems there is a bug and i have already corrected that. Next version this will be corrected. Then you will be able to set anything.
As you are not using “Multiple recipient” feature, this settings will not affect you and you will not find any difference.

Please go to Dashboard > Front End PM PRO > Settings > Emails and see if all fields are filled (eg. New Message Subject, New Message Content etc )

Let me know.

As you have added administrator role later, You can add announcement normally.
Let me know.

Please use following

    add_action('save_post', 'undelete_thread');
    function undelete_thread($post_id) {
        $post = get_post($post_id);
        if ($post->post_type == 'fep_message' && $post->post_parent){
            $participants = fep_get_participants( $post->ID );
            foreach( $participants as $participant )        
            {
                delete_post_meta($post->post_parent,'_fep_delete_by_'. $participant );    
            }
        }
    } 

You can add remove_action( 'fep_action_message_after_send', array( Fep_Emails::init(), 'save_send_email'), 20, 2 ); just before using fep_send_message()

$admins = fep_get_option('oa_admins', array()); will give you array of admins.

I have sent to 1000 users and it seems it sent to all users.
Can you please try again.
Also please debug on and try to see error log of your server if anything there regarding this.
Let me know.