I have set up an email account which receives emails and creates ticket in Jira against each email. Now if email includes any pictures as part of email body then I want to show them as part of corresponding ticket body in Jira. Currently they are becoming attachments even though 'description' field is a 'Wiki style renderer' field. Please guide me what to do I will be truly thankful.
As Scott Dudley already commented, JIRA's built-in mail handler does not support inline images in created issues.
However, there are a few commercial add-ons that do support this. Some popular ones are Enterprise Mail Handler for JIRA and Email This Issue.
For the relevant documentation, check: