I have been searching for this query everywhere, but I finally got one of solution.

Yes, one of the fastest and most reliable methods to open and read EML files instantly is to use a dedicated EML viewer rather than configuring an email client like Outlook or Thunderbird.

SysTools EML file reader allows you to quickly open and read EML files, view email content, headers, properties, and attachments without requiring any email application. Simply load the EML file and access its contents immediately.

If you're dealing with multiple EML files or need advanced capabilities, SysTools EML Viewer Pro+ offers bulk EML file loading, advanced search across emails and attachments, and export options to PDF, MSG, PST, and CSV formats. This makes it especially useful for email investigations, data management, and archiving tasks.

For users looking for an instant and hassle-free way to access EML files, a dedicated EML viewer is generally the most efficient solution.