I have a dating site that automatically sends out compatible matches in an email on a scheduled basis, such as a week, a day, or twice a week, etc to every member that has just joined the site. But the funniest thing is that when the member's profile has been deleted from the database by admin, ideally no more mails containing matches for him should be sent at all, but this was in fact what happened: the mail continues to be sent out to such deleted members, with the "To:" portion of the email header reading as "No recipient email address". So, how could a non-existent member still continue to be sent emails by the php script of the dating site (since he was already deleted)? This is the bug that needs to be fixed.
Apparently the php script of the dating site stubbornly continues to send out mails containing matches to members, even though these members already have been deleted from the database by admin.