Regex : ^[^@ ]+@[^@.]+\.\w+$
| String | Reason | Disqualified by |
|---|---|---|
test@.com |
After matching @ there must be 1 or more characters until "." but there is none | [^@.]+ |
test@test.gmail.com |
After a "." is found only word characters are allowed | \.\w+ |
te st@gmail.com |
Space character not allowed | [^@ ]+ |
test@gmail@gmail.com |
After an "@" is found, there can't be any more "@" all the way to the end | @[^@.]+\.\w+$ |