Unexplained 0 byte files in my /var/spool/mail folder
I'm getting some fairly randomly named files appearing in my mail folder (/var/spool/mail) on redhat linux 7.2
They are owned by a legit user "t_a" and have 0 bytes, so not much of a threat in themselves, though at one stage I did have about 2 thousand of them.
I've searched the logs for instances of the same name, but found nothing. It looks a little like a temp file or a lock file, but they don't seem to clear down after time.
Anyone seen this kind of thing before?
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF%01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF%s1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF+01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF+s1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF,01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF,s1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _9nF.01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _Y7F%01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _Y7F%k1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _Y7F+01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _Y7F+k1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _Y7F,01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _Y7F.01AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _nWF%y1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _nWF+y1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _nWF,y1AVCB.host.servername.dom
-r-------- 1 t_a mail 0 Apr 6 17:25 _nWF.y1AVCB.host.servername.dom
Thanks
JF
