Pushpith,
1. Attach Entire Email is set to YES, but post sending the request we can see an additional mail file in the physical directory with size 0KB. There are many such records in the directory.
Do you have both the "split out attachments" and "attach entire email" options being used at the same time on the mailbox? If so, try turning one of those off and see if that helps here.
2. Getting below error msg, so the tickets are not getting updated:
These messages typically occur when the change order for which the attempt to close it is made, has some incomplete wf tasks, OR, it has a child ticket which has incomplete wf tasks. Take a look at the change order, and any children of that change order. If that is not the case here, then I would suggest opening a support case for this one so we can look into it further with you.
3. Post the ticket is raised by the end user, when he tries to resolve the same ticket thru maileater, he is not able to do so.
If other user tries to update the same ticket, then he is able to do so.(Both have analyst access).
Again this could be for multiple reasons - it could be something with permissions/data partitions, OR it could be something with Tasks.
For these items, it may be better to open a support ticket to get assistance as these may be more difficult to troubleshoot via the communities.
Thanks
Jon I.