CiviCRM 5.3 (at the moment), Drupal 7.63 Mosaico Ext- 2.0-beta4.1528762072
View Mailing as browser link from emails working fine for logged in users, not for anon
Given view public mailing content prmission to all users. Flushed Civi and drupal caches
Still no access for anon users (yup, it's set as public pages)
Only new factor for me here is the mosaico extension. Anyone else had similar issues? know where else I can look?