Better explain the most common problems when testing emails#7115

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javiereguiluz wants to merge 6 commits intosymfony:2.7from

javiereguiluz:email_test

Commits on Nov 5, 2016

Commits on Nov 7, 2016

Added subtitles in the Troubleshooting section
javiereguiluz
committed

Commits on Nov 23, 2016