[feature request] Check for email address (instead of domain)

[sphh]

I used Check and Send, but was looking for an add-on, which provided a delayed send feature (Check and Send has one, but it is difficult to cancel a pending sending. I like Flex Confirm Mail's approach much better.) Thanks for making this add-on!

But now I miss the ability to check for a certain email address. I can check for domains, but not for special email addresses.

Here is my use-case: Most of my emails are Bcc'ed to a special email address, so I have configured that address as default Bcc address. But some emails should not go there – and I always tend to forget to remove that address. I would like so set up Flex Confirm Mail to ask me, if this address should be really included before it sends the mail. Is that possible?