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Google has once again bolstered Gmail security with new features to highlight potentially unsafe senders and links.

When a message cannot be authenticated with its Sender Policy Framework, a red question mark will be shown in place of the sender’s profile photo or avatar.

On the web, users will also receive a full-page warning if they click a link they are sent that could lead to phishing campaigns, malware or unwanted software.

“Not all affected email will necessarily be dangerous,” it said in a blog post. “But we encourage you to be extra careful about replying to, or clicking on links in messages that you’re not sure about. And with these updates, you’ll have the tools to make these kinds of decisions.”

These are just the latest changes intended to make browsing safer for users.

Back in March, Google introduced full-page warnings when users clicked on potentially unsafe links in their emails – a feature that was extended this week.

The update earlier this year also included a full-page warning to advise users on how to stay secure if state-sponsored attackers were attempting to compromise their accounts.

And it also improved its encryption notifications to warn users when their messages are not delivered using encryption – a move that saw the number of inbound emails sent over an encrypted connection increase by a quarter within 44 days.

In February, a Google Chrome update meant the browser began automatically blocking deceptive websites containing potential social engineering threats.

And in December 2015, the technology giant changed the default web browsing setting on Android devices to use its Safe Browsing feature in an attempt to help users avoid malware and keep their smartphones and tablets protected.

“We need to keep an up-to-date list of bad sites on the device to make sure we can warn people before they browse into a trap,” it said of the change at the time.

“Providing this protection on a mobile device is much more difficult than on a desktop system, in no small part because we have to make sure that list doesn’t get stale.”

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