Google has introduced two new features for Gmail. The new
block feature lets you block specific email addresses and the
unsubscribe option will enable you to opt out of eligible
mailing lists directly from the Gmail app, which comes handy
for unnecessary newsletters. Once you block someone, future
emails from them will directly go to spam folder, skipping
inbox, but you can unblock them anytime from the Settings.
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Both these can be enabled from the option in the menu inside
an email. The block option will be available for the web
starting today, and will roll out for Android over the next week.
The unsubscribe option that is already live on the web is now
available for Android.

These are definitely handy features for the Gmail app. Google
did not announce when these new features will be available for
the Gmail app for iPhone.