I just wrote a rather long mail to my aunt (who uses a @me.com iCloudmail-adress). I right clicked on her adress from an old mail she sent, and chose "Write New", so there's no chance that I misspelled it. When I pressed the Send button in the native ML Mail-app it did take an unusually long time to send the mail, but after maybe 20 seconds I heard the familiar "Wooosh" sound. When I checked my "Sent" folder it did not show up there however. Is there a chance that the mail didn't get through or how should I interpret this?