A method, system and computer program product for preventing messages from being sent using inappropriate communication accounts. A message created by a user of a mobile device is analyzed to identify the topic and sentiment. The appropriateness of the message being sent to the intended recipient(s) using a selected communication account (e.g., company social media account) is determined based on one or more factors, including the analysis of the message to identify the topic and sentiment. A score is generated as to the appropriateness of sending the message to the intended recipient(s) based on such an analysis. If the score is less than a threshold value, then the message is deemed to not be appropriate to be sent to the intended recipients using the selected communication account. In this manner, potentially erroneous communications, such as accidentally posting a message to a wrong social media account, may be prevented.