The regret felt after you realize that you should not have provided your email address to someone who then sends various annoying and otherwiseintrusive emails.
Nancy continues to send me those annoying chain emails and keeps wanting to get together with me. I e-gret the day I gave her my email address.
e-gret (noun, verb): The feeling of sorrow, shame, remorse, or fear one experiences after sending an ill-advised electronic message (e-mail, IM, text message) that cannot be recalled.
I completely misread our flirty IM exchange, and now I'm filled with e-gret that I pinged her saying, "So, when are we gonna have sex?"