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Pro Free plan
With options of monthly or pre-paid plans.
Pro Customer support via phone
Pro Simple and Advanced mail editors
You can choose to use a Beefree or CKEditor to edit your messages.
Pro Tutorial for beginners until the first sent mail
Con Brazillian Portuguese only
As the time of writing(30/08/2016), the only language is pt-BR. Even though the support answers in English if needed.