Based on this Post
I should mention that if you try to Nag a Player then they may not get an Email if:
A. That Player has changed their Email address but failed to verify it (Limited mode)
B. The Player was placed in the Limited Group usually because they are pending deletion (Unsubscribed)
C. The Player has placed a fake Email address or block that causes Emails from our server to bounce. When this happens we put their account on a 'no send Email to this User' setting so they do not get any more Emails until they fix their end.
If you are ever wondering about the status of a Player you should check their Introduction first before sending them Nags. For instance suppose the Player said they were unavailable between certain dates, then your Nagging them will truly be unfortunate. Of course, if there is nothing specified in their Introduction about their status or availability then by all means - Nag them!Example
You can always use the Search Field to the top of every page by putting the Username followed by "Introduction". For example: JB Introduction Search Results