Rackspace MailGun is leading in Top 100K Sites and Top 1M Sites.
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Rackspace MailGun is leading in Computer & Electronics, Software, Finance, Credit, Loans & Mortgages and 9 other categories.
Rackspace MailGun is leading in most countries, including United States, India, United Kingdom, Chile and 6 other countries.
SendMsg is leading in Israel, Russia, Czech Republic, France and 4 other countries.