We touched on the topic of apologising last week. Macmillan Dictionary’s blog has a very useful article on how to apologise. You can choose whether you’d like to use formal or more informal language.
Have you ever sent an embarrassing email by sending it to the wrong person or by hitting ‘Reply All’ by mistake? Perhaps the best thing to do is to apologise in person or by phone. But what could you say? The best is just to say how sorry you are and that you hope the other person will be able to forgive you.