[travis] mock email
[travis] mock email

Soullivaneuh/sonata-sandbox,KonstantinBY/sonata-sandbox,sonata-project/sandbox,KonstantinBY/sonata-sandbox,Soullivaneuh/sonata-sandbox,Soullivaneuh/sonata-sandbox,zsamotsil/polcode_task,KonstantinBY/sonata-sandbox,rzproject/sandbox,davask/exim-cms,KonstantinBY/sonata-sandbox,sonata-project/sandbox,zsamotsil/polcode_task,Soullivaneuh/sonata-sandbox,rzproject/sandbox,davask/exim-cms,rzproject/sandbox,sonata-project/sandbox,tworzenieweb/polcode-recruitment,davask/exim-cms,tworzenieweb/polcode-recruitment,davask/exim-cms