Trimming Email Addresses

I have a client who insists on putting a space at the end of his email address. I know this, because I have seen screen shots, and the space is visible in the "do you want to save password" message from the browser.

Of course, spaces are not allowed in email addresses, so it fails the verification.

It should be simple enough to add a Trim() somewhere, but I can't see it! Can anyone tell me where I should add it, please.

Use ReplacePatterns parameter like in the documentation to trim whitespace before and after the e-mail address.

Thanks for the quick response. Will check there.