Hi Amal,
Unfortunately I was not able to cut off the mail body from ticket summary. It continued to appear after the mail subject in the ticket summary, both mail body and mail subject appeared in ticket summary. In addition, I saw the tags -[[ and ]]- appearing in the ticket summary.
And yes, both mail body and mail subject appeared in the ticket description.


The only way to have only one line appearing in ticket summary is to use the tag %SUMMARY=<text to be displayed as ticket summary> in the mail body.
I don't see another way of doing this. Not sure if someone else could have other inputs, maybe doing some kind of customization.
If this is not accepted, you could raise an idea in communities requesting some enhancements in this area.
Regards,
Roberto