Sending mail to Yahoo!

[eluser]gon[/eluser]
If you send test emails with nonexistant accounts or domains, yahoo will include your server in its black list.
I had an issue with this in the past.

You should check your mail log to see what happens when sending emails to yahoo.

If you're already on the black list, you must send an email to some department at yahoo, but the process is quite cumbersome.