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I've been getting errors in Sparrow all morning on my iPhone 5. It's definitely not just you.
 
Problems with iCloud and mail

For information, I've been having intermittent problems on my iMac with Mac Mail demanding iCloud password and not being able to log in for 3 days now. I put a thread on the mac support forums and there are several others with the same problem. I can log in via Safari ok. Looks like a server problem:(
 
I've had problems with Sparrow connecting since yesterday. Both on my Mac and on my iPhone.
 
I keep getting returned mail "delivery delayed/failed" type stuff all week intermittently.
 
I keep getting INTERNET MAIL DELIVERY emails every time I receive emails from my iCloud email account. I checked iCloud status and they don't have any reported issues.
 
Internet Mail Delivery

Yes, same thing is happening here. I've received many of these notices referencing email that I received correctly. In other words, I will receive an email, and at the same time, I will receive another email, "Internet Mail Delivery", which says there was a problem, of some kind, with the first email. Even though the first email was received in fine order.

So, it's not me, I'm not going crazy, (well, that depends on who you ask) and I'm sure this is a glitch that Apple will work out.
 
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