How to check mail have read or not

There are several ways to check if an email has been read or not, depending on the email client or service you're using. Here are a few methods:

Method 1: Check the email client's read status

Method 2: Check the email's metadata

Method 3: Use a third-party email tracking service

Method 4: Use a browser extension

It's worth noting that not all email providers or clients may support read receipts or tracking, so these methods may not work for all emails. Additionally, some email providers may have policies against using email tracking services or browser extensions, so be sure to check the terms of service before using them.