Insert svg file into mosaico mailing
&quot;Safe File Extensions&quot; can be configured under &quot;/civicrm/admin/options/safe_file_extension?reset=1&quot; - you could probably add .svg there.
This should allow you to upload sch files in CiviCRM. I am however not sure if that configuration also applies to Mosaico and if Mosaico can handle svg-Images.