I read several maildrop issues and mine is a little different than all of them.
My error is: status=deferred (temporary failure. Command output: ERR: authdaemon: s_connect() failed: Permission denied /usr/bin/maildrop: Unable to write to temporary file - possibly out of disk space. )
As this seems very easy, check diskspace and here is the catch:
sudo df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 66G 26G 36G 42% /
varrun 4.0G 124K 4.0G 1% /var/run
varlock 4.0G 0 4.0G 0% /var/lock
udev 4.0G 56K 4.0G 1% /dev
devshm 4.0G 0 4.0G 0% /dev/shm
/dev/sdb1 272G 1.4G 257G 1% /var/www
overflow 1.0M 4.0K 1020K 1% /tmp
There is no issue with any of my diskspaces..
sudo mail drop -v
maildrop 2.0.3 Copyright 1998-2005 Double Precision, Inc.
I use Ubuntu 8.04.3 LTS and did not update anything before or after the error came and there is no autoupdate script running..