Who is sending emails out of my Exchange?

Hellovladob,

It's Ahmed, and I hope you could solve your issue, as it's from a long time!
This reference is for future visitors of this issue!

it appears that someone or something is using your email address to send emails through your Exchange server. We recommend taking the following steps to determine the cause of the issue and prevent it from happening again:

• Check the IP address of the sender: You can try doing a reverse DNS lookup on the IP address of the sender (78.24.15.102) to see if it belongs to a known server or service. You can also try doing a who is lookup to see if the IP address is associated with a specific organization or provider.

• Check for unauthorized access to your Exchange server: Check the logs on your Exchange server to see if there are any suspicious logins or activity and check the security settings to ensure that your server is properly configured and protected.

• Check for compromised email accounts: Check the logs on your Exchange server to see if there are any suspicious logins or activity associated with specific email accounts, and check with the account owners to see if they are aware of any unusual activity.

• Check for malware or other malicious software: Run a malware scan on your Exchange server and any email accounts that may be affected, and check for any suspicious or unfamiliar files or programs.

• Check for configuration issues: Review the configuration of your Exchange server and email accounts to ensure that everything is set up correctly and check for any issues that may be causing the problem.

To prevent similar issues from occurring in the future, we recommend implementing strong passwords, keeping your system and software up to date with the latest security patches, and using antivirus software to protect against malware and other threats.

Thanks 🙂
Ahmed:D