[revorad]

If you can predict the correction with good accuracy, why wouldn't you just fix the address on the backend? The only reason I can think of is to avoid spamming someone else in case of a wrong guess. But for popular domain name spelling errors, that should be almost never.

[jeff18]

"Almost never" is not good enough when you silently send someone's sensitive files to the wrong person.

[ars]

What is someone actually has a domain that is similar to a popular one? They would never actually be able to enter their email since it would constantly be "corrected" to the wrong address.

[chrisacky]

That would be an awful suggestion. What would this poor chap do? http://gail.com/

[jonny_eh]

Do both? I'd personally like to know if/when I enter my email address incorrectly.