I use BoltForms (on Bolt 3.3.6) and I noticed some extra info in the subject line of each message.
It is something like this:
HTTP/1.0 200 OKCache-Control: no-cacheDate: Wed, 04 Oct 2017 06:47:33 GMTSubject email message
The same info is added to the body of the message.
Why and how is this happening? Can this be removed? It is really annoying, because on the subject line in the message list only this is visible and not the actual subject.