I will complain :-)
Well.
I have the same problem here. From the moment I first time installed Mercury, year and so.
And it is a WONDERFUL PRODUCT but this little annoyance is just ... annoying :-)
When I start Mercury it fetches my emails via POP3 from outside mail server and delivers them locally to be read by IMAP client.
Of
FIRST fetch, no matter how many emails fetches - app. 1/4 messages get
stucked by "Transient error - job deffered for later processing".
Others are delivered but this 1/4 stays in "Pending" state. After some
time(?) they get delivered to. Don't know about this "time" parameter
but I would say it is something about 20 mins or so.
At that time many files in QUEUE have this "File rename failure for xxxxxx" message.
Now, I have NO AV program, NO any other program that would access files and interfere with mercury. No NOTHING.
Frankly, I would plainly say there is a bug somewhere so please fix it and make this great software even better.
Thank you.