1. Show Header Link to Registered Only doesn't work i have it enabled and visitors can see the messages button.

2. Any way to make messenger to not send email at all?

@oscman
1) I have tested it on demo and everything works fine (you can test it as well)
2) Will consider it in next update

Maybe its just for veronika theme, i installed 2 times fresh osclass, fresh veronika and fresh messenger, the show only to registered users doesn't work with veronika theme

@oscman
Veronika use own functions.
Go to header.php of veronika.

Find:
<?php if(function_exists('im_messages') { ?>
Replace with:
<?php if(function_exists('im_messages') && (osc_is_web_user_logged_in() || osc_get_preference('link_reg_only','plugin-instant_messenger') <> 1)) { ?>

i did that and this just hidding the number of inbox messages the link to messenger is still there

@oscman
Try to replace both occurences.

still doesnt work

@oscman
Then you do something wrong.
It will be included in next update.

I changed this:

  if(function_exists('im_messages')) {
    if(osc_is_web_user_logged_in()) {
      $message_count = ModelIM::newInstance()->countMessagesByUserId( osc_logged_user_id() );
      $message_count = $message_count['i_count'];
    } else {
      $message_count = 0;
    }
  }
To this:

  if(function_exists('im_messages') && (osc_is_web_user_logged_in() || osc_get_preference('link_reg_only','plugin-instant_messenger') <> 1)) {
      $message_count = ModelIM::newInstance()->countMessagesByUserId( osc_logged_user_id() );
      $message_count = $message_count['i_count'];
    } else {
      $message_count = 0;
    }
Or did i get it wrong?
 

@oscman
Carefully check what should be replaced.

ok replaced all instances and worked i should take a break now.