Good news for Gmail users who want to access their emails and except connection (offline). Until now this was possible with two different options: through a client like Thunderbird or through one special extension of the program tours Chrome.
However, today the feature is also available through Gmail itself, as long as you have it open via Google Chrome.
By offline accessing your emails, you will be able to browse through them, regardless of the status of your Internet connection.
Google started redesigning the Gmail web version in April of 2018. As we mentioned in previous posts, changes are not only external to the look, but they also add some new features to Gmail, such as confidential mode, and direct access to the attachments.
One of the new features of the redesigned Gmail is the ability to directly configure offline access to Gmail. We directly state why you no longer need an extension or one email client third party.
The basic precondition for seeing the new feature is to have the latest version of Google Chrome, as offline email is not currently available to other browsers.
But let's see how you can activate it service:
Open the Gmail website and sign in to your account. Click the gear icon and select Settings. Select offline from the available options on the Settings page.
Tip: you can access the settings directly by clicking on the address below https://mail.google.com/mail/u/0/#settings/offline
Check the "enable offline mail" option and select how many days you want to save on your computer. 
You can change the storage period from 30 to 7 or 90 days.
Choose whether you want to download all attachments to be accessible and offline.
Select the setting “after logging” – “keep offline data on computer” depending on whether you want to keep them data offline on the computer or delete them automatically.
Please note that at this time, a third-party email client is still the best option if you need offline access to Gmail emails as there are no time restrictions. However, Gmail users who only use the Gmail web application and Google Chrome will find useful new features.
For example, another new feature currently under experimental stage is Smart Compose. Yes you can access the new function by following the instructions are here.
