Email interface is look like below screenshot.You can toggle between multiple configured accounts with just one click.

As per display in screenshot, like a basic search functionality, you can enter any keyword and search through opened folder.

As per display in screenshot, you can enter any keyword and search through all you emails.You can filter your emails using advance search functionality.

To send email click on envelope icon from sidebar.You can quickly email to your odoo partner using web mail.

You Can Add New Contact by Filling Required Details Like First Name, Last Name, Company Name, and Email Address Add New Contact Here and It Will Create Partner in Odoo

It also provides a list of contact saved in odoo web email interface, as a directory to use.

You Can Create New Folder in Odoo Web Email Interface. This Helps You to Organize Your Emails More Effectively.

Odoo web email interface also provides functionality of rename/delete folder.

You can change color of your mail interface from provided themes.

You can also adjust sidebar as per your need to view emails in large screen or default one. Sidebar is collapsable.

Change the Language From Gmail Settings. Change Default "English" Language to Other Languages. This Will Be Reflected in Your Odoo Web Email Interface.

All gmail folders displays in gmail configured language like here in a French. All folder related operation can be performed with these translated folder names.