i have a ruby-on-rails app hosted in Heroku.
one of the modules it contains is an email platform in order to send messages to less than 700 recipients.
this functionality is currently configured with the Heroku Add-on called SendGrid (bronze package).
the problem is that 30% aprox of the emails are arriving to the spam folder of the recipients.
i need to practically have the 100% of the messages sent arrive to the inbox!
this is all that is needed: no messages arriving to the spam folder.
right now the mailer module is working, but not with a 100% accuracy when avoiding the spam folder.
that's the reason that i will only pay the fixed price defined ONLY if the 100%, or very close to 100%, of the recipients receive the messages sent in their inbox folder.