There are no reports of messages disappearing that weren't the result of some sort of filter.  If you are certain that the message was not acted on by a filter rule then it is possible you inadvertently enabled an auto-filter although if this were the case the message should have been in a folder somewhere unless that folder was being acted on by a general rule set.  Anyways, to see what auto-filters are in place right click on a folder name, select autofiltering then Manage Autofilter folders.  This will display any folders for which auto-filtering is enabled.

I have recently had about two incidents whereby messages have disappeared without trace, yet I had definitely NOT clicked on Delete.

I cannot locate them in any folder. When this occurred previously I ignored it because the message was not important, but today I suffered a deletion of an important message.

Is this only me or has anyone else noticed that?

Kenneth Spencer