Try quitting Mail, then opening it again.Ĭhoose Window > Connection Doctor, then follow any instructions in the Details column. If you’re missing emails from a specific person or group, check whether you blocked messages from them. Try sorting messages in the message list by Date or another attribute, or searching for messages, to verify if you received them.Ĭheck whether your account is offline or disabled (inactive). See View Mail activity.Ĭheck if you’re using filters in the message list that are preventing expected messages from being shown. Check whether Mail is retrieving a large message or a message with large attachments.