Dky mail

You're referring to the popular phrase "DKY Mail"!

DKY stands for "Don't Know Yet", and it's often used in email subject lines or as a humorous way to acknowledge that you're still working on a response or don't have all the information needed to provide a complete answer.

For example, someone might send an email with the subject line "DKY Mail: Need More Info" to indicate that they're still gathering information or need more time to respond.

It's a lighthearted way to communicate and can help set expectations with the recipient.