Gmail’s new warning could save you from major embarrassment

TL;DR Gmail has started alerting users when they try to reply all to emails on which they were BCC’d. The change should help you avoid accidentally letting people know you were blind-copied. All Gmail users should see the new alert when applicable beginning today.

Gmail’s got a new feature that could save you some embarrassment. Starting today, when you reply-all to an email that you’re BCC’d on, you’ll see a warning that lets you know what you’re about to do will let everyone on the chain know that you were blind copied. Google outlined the change in a blog post today.

Effective immediately, when you click the Reply all button under an email that you were BCC’d on, you’ll see a prominent, yellow banner to warn you that you’re about to send your reply to everyone who was CC’d on the original message, which will both let those people know you received the original message and expose your email address to them.