Gmail External Email Highlighter is a email extension for chrome. it's a free extension , it has 123 active users since released its first version, it earns an average rating of 5.00 from 1 rated user, last update is 3223 days ago.
If your company uses Gmail's web client to send emails, this extension will highlight email addresses that fall outside of rules you define. This way your users can easily see if they're accidentally sending an email to someone outside of the company. Or you could just put your bosses email in to make sure you're never caught out by not noticing them in the CC box! Email rules are set using regex.
You could download the latest version crx file or older version files and install it.
English (UK).
You could find more help information from gmail external email highlighter support page.
You could send emails to publisher, or check publisher's website.
More about manifest_file of gmail external email highlighter.
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