Stop sending spam mails, solve issue and delete all spam

At a DirectAdmin account on my server I get this message: --------------------------------------------------------------------------------------------------------------------------------------------- The ****** account has just finished sending 200 emails. There could be a spammer, the account could be compromised, or just sending more emails than usual. After some processing of the /etc/virtual/usage/******.bytes file, it was found that the highest sender was info@******.**, at 201 emails. The top authenticated user was info@******.**, at 201 emails. This accounts for 100% of the emails. The higher the value, the more likely this is the source of the emails. An authenticated username is the user and password value used at smtp time to authenticate with exim for delivery. The top sending host was [login to view URL], at 114 emails (57%). The most common path that the messages were sent from is /, at 201 emails (100%). The path value may only be of use if it's pointing to that of a User's home directory. If the path is a system path, it likely means the email was sent through smtp rather than using a script. This warning was generated because the 200 email threshold was hit. --------------------------------------------------------------------------------------------------------------------------------------------- I am using a Joomla website on this account and checked Joomla and its extensions, all are up to date. PHP is a bit behind: 7.2.11 Looking for someone who can stop the spam, solve the issue that causes it and delete all spam in queue and from inbox info@******.**