BuiltWith returns all the technologies in use that it can from the domain name of the email.
Works with:
12K+
Overview
Find out what technologies the website is using with BuiltWith. 

BuiltWith technology tracking includes widgets, analytics, frameworks, content management systems, advertisers, content delivery networks, web standards and web servers.
Additional information
PricingNot available
Developer
Trader status unspecified
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BuiltWith will ask for the permissions shown below. Learn more
BuiltWith will need access to your Google account
This will allow BuiltWith to :
View your email message metadata when the add-on is running
Run as a Gmail add-on
Connect to an external service
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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