Merge branch 'hotfix/13816_get_stream_contents' into 'Support/2.6.X'
fix (13816) : get stream data in message->attachment if attachment is more than 2Mo
See merge request !462 (merged)
(cherry picked from commit dc306055)
7e5fcc9b fix (13816) : get stream data in message->attachment if attachment is more than 2Mo