Forum Moderators: coopster
Granted, it's more of a work-around than a solution - but it will solve your problem. I always try to remove any variables that I cannot control. Third-party SPAM settings would fall into this category.
Some email providers (e.g. Hotmail) will sometimes simply delete emails received from domains without valid PTR records. You don't receive a bounce notification and the email never even reaches the spam folder.
Why do you need to send info to so may emails? Why not send to a single web-based email (like Yahoo) and then use a third-party app like Eudora or Outlook to check it?