Cryptgeon - Securely share self-destructing notes
Mailinator - Any Inbox. Any Time.
BURN.link - Send secure, encrypted, self-destructing messages
10 Minute Mail - Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
Burner Note - Burner Note is a free, ad-free and open sourced service for sending secure text based notes that are completely erased from existence once they've been read.
Protect IID - Protect your privacy with single-use email addresses