iPhone Cryptic Error : Invalid Recipient

While I really enjoy my iPhone’s ease of use it does spit some really cryptic errors sometimes. Namely one I’ve kept running into after changing over my domains to the new Shared Accelerators from Joyent which changed my SMTP information.

For some reason my new SMTP information just wouldn’t sync to my iPhone correctly - at best the server info will but the username and password were blank. I’m not 100% certain that the error is not exclusive to Joyebt’s email servers as I have seen it on another server as well - but when the username or password is wrong when attempting to send uemail you are presented with the following error:

“One of the recipient addresses was invalid”

Frustrating and exceedingly cryptic, but if I write it down then I might actually remember what the error means next time.