NSError *error = nil;

[[[SHEmailValidator] validator] validateSyntaxOfEmailAddress:emailAddress withError:&error];



if (error) {

    // An error occurred

    switch (error.code) {

        case SHBlankAddressError:

            // Input was empty

            break;

        case SHInvalidSyntaxError:

            // Syntax completely wrong (probably missing @ or .)

            break;

        case SHInvalidUsernameError:

            // Local portion of the email address is empty or contains invalid characters

            break;

        case SHInvalidDomainError:

            // Domain portion of the email address is empty or contains invalid characters

            break;

        case SHInvalidTLDError:

            // TLD portion of the email address is empty, contains invalid characters, or is under 2 characters long

            break;

    }

} else {

    // Basic email syntax is correct

} 

NSError *error = nil;

NSString *suggestion = [[[SHEmailValidator] validator] autocorrectSuggestionForEmailAddress:emailAddress withError:&error];



if (error) {

    // The syntax check failed, so no suggestions could be generated

} else if (suggestion) {

    // A probable typo has been detected and the suggestion variable holds the suggested correction

} else {

    // No typo was found, or no suggestions could be generated

}