Yes I'm just seeing this now.
Splunk is not properly escaping angle brackets in the Query line:
When a "<" is used in your search, the HTML gets "unbalanced and Outlook gets confused.
If you right click the body of your e-mail and select view source you should see your entire message including the HTML which is not getting displayed.
Here's an example of a search which causes the problem for me:
Query Terms: 'index="uad-os" sourcetype="uad-diskspace" Mounted="/opt/psreports" (host=psdps* OR host=pspps*)|dedup host | convert num(Use) |search Use<65 |fields + host, Avail,Filesystem,Mounted,Size,Use, Used, tag::host| stats values(*) as * by host, Use |rename tag::host as "Host Tags",Use as "Percent Used"'
Conversely, my search reporting the opposite condition which includes a greater than character ">" does not cause the problem.
This was a pain to track down.
Splunk should probably wrap The "Query Terms:..." line in pre tags or escape all non-HTML into entity equiv.
Personally, I'd like an option which does not include all the garbage used to produce the results. I just want the results and a clean link to the results.
<a href="bigmessy-internal-splunk-url">Link to results</a>