http://www.autoresponderpro.net/test-autoresponder/
Does Yahoo mail block Autoresponders?
Was testing an autoresponder with my Yahoo account and no return??????
OK I guess I should also say, yes I have checked the bulk mail. And yes it works from every other mail program I have.
It is possible. Sometimes Yahoo blocks emails from entering if the sender looks like possible junkmail. Check your “Bulk Folder” to see if the message you are looking for is in there. If it is, check it as “Not Spam”. It will no longer block emails from that sender once you check it. After that, look in your Inbox. You will find the email you want there and it will not longer be blocked by Yahoo’s Spam Filter.
Sonny Harrison How To Internet – How to test your autoresponder messages