yahoo email failing on my iphone4


Customer Service
I have an iphone4 and some of my emails are failing. Some will send and some won't. I get an error that says "unable to send email A copy has been placed in your outbox. Sending the message content to the server failed."

The only common thing I noticed was the four that failed all contained a link in them. Each one was only sent to one email address so it shouldn't have appeared as spam.

I have been able to send some that didn't have links but any with links are failing.

Any ideas?

I know I'm usually answering questions but this one has me stumped. :)