Bugzilla

(In reply to Richard Leger from comment #4)
> Does the indexing process index only the headers of the email or also the body?

Headers, and first 20k (IIRC) of body.

> I don't know if that matter, but in my case all folders are set not to be used offline ("Select this folder for offline use" option is disabled on all folders) so I would expect the indexing not to index the body of message as it isn't present in the local cache and I would not want the indexing process to download all messages locally (eg 100GB worth of emails). 

Then if doing just headers, indexing should be very fast.

> If a search is requested on the body content, I would expect the search to occur on the server side where the body content is present. "Run search on the server" to be enabled automatically when searching criteria include Body field while working in online mode. This option is available in Message Search feature, and Quick Filter search... but is it implemented in the Global Search feature which currently may require Body indexing to work?

AFAIK global search only operates on data that has been downloaded.  If the body has not been downloaded then the body content will not be found.

(In reply to Richard Leger from comment #4)
> Does the indexing process index only the headers of the email or also the body?

Headers, and first 20k (IIRC) of body.

> I don't know if that matter, but in my case all folders are set not to be used offline ("Select this folder for offline use" option is disabled on all folders) so I would expect the indexing not to index the body of message as it isn't present in the local cache and I would not want the indexing process to download all messages locally (eg 100GB worth of emails). 

Then if doing just headers, indexing should be very fast.

> If a search is requested on the body content, I would expect the search to occur on the server side where the body content is present. "Run search on the server" to be enabled automatically when searching criteria include Body field while working in online mode. This option is available in Message Search feature, and Quick Filter search... but is it implemented in the Global Search feature which currently may require Body indexing to work?

AFAIK global search only operates on data that has been downloaded.  If the body has not been downloaded ("sync") then the body content will not be found.