I've been having SMTP connection issues with Yahoo email for months. When I send an email via my yahoo account (using the native app), it fails to send perhaps 1/3 of the time. This is not a new problem, but seems to me to be getting worse. I simply get an "Unable to send mail" error notification. Usually, a couple at sync will make it successfully send. Or it will go out sooner or later if I wait. Tonight, it's not working at all. I've checked my settings, and they are all correct. And I do not have WiFi on. And as I said, it does work sometimes. But I did notice that if I try to re-confirm my settings using the setup wizard, it returns with a "server not responding" error for the SMTP settings tonight. I hadn't thought of doing this before, so I don't know if this is the usual issue, or "just tonight". Have others experienced this issue? I'm wondering if there is something broken locally, or whether Yahoo's servers are unreliable, or ... Note that all other network connectivity seems fine. And I have tried deleting and re-creating this account (on the handset), which has not helped -- though I haven't tried it recently.