How to find who login in mail in network

There are several ways to find out who logged in to a mail server in a network:

Method 1: Using the Mail Server's Log Files

  1. Check the mail server's log files, which typically contain information about login attempts, including the IP address and username of the user who logged in.
  2. Look for log files related to the mail server, such as /var/log/mail.log or /var/log/exim4.log (depending on the mail server software).
  3. Use a text editor or a log analysis tool to search for login attempts and identify the IP address and username of the user who logged in.

Method 2: Using the Network's Authentication Server

  1. Check the authentication server logs, which typically contain information about login attempts, including the IP address and username of the user who logged in.
  2. Look for logs related to the authentication server, such as /var/log/auth.log or /var/log/secure (depending on the authentication server software).
  3. Use a text editor or a log analysis tool to search for login attempts and identify the IP address and username of the user who logged in.

Method 3: Using a Network Monitoring Tool

  1. Use a network monitoring tool, such as Wireshark or Tcpdump, to capture network traffic related to the mail server.
  2. Analyze the captured traffic to identify login attempts and extract the IP address and username of the user who logged in.
  3. Use a text editor or a log analysis tool to search for login attempts and identify the IP address and username of the user who logged in.

Method 4: Using a Mail Server Management Tool

  1. Use a mail server management tool, such as PostfixAdmin or Roundcube, to access the mail server's configuration and logs.
  2. Look for logs related to login attempts and identify the IP address and username of the user who logged in.
  3. Use a text editor or a log analysis tool to search for login attempts and identify the IP address and username of the user who logged in.

Method 5: Using a Network Security Information and Event Management (SIEM) System

  1. Use a SIEM system, such as Splunk or ELK, to collect and analyze logs from various network devices and systems.
  2. Configure the SIEM system to collect logs from the mail server and other relevant devices.
  3. Use the SIEM system to search for login attempts and identify the IP address and username of the user who logged in.

Remember to always follow proper security protocols and procedures when analyzing logs and monitoring network activity.