strange errors in send log

[netgeek]

OS: freebsd 4-stable
qmail: 1.03

tail -f /var/log/mail/send/current
@400000004031e27b1ce8e6dc status: exiting
@400000004031e27b1e4e627c status: local 0/10 remote 0/255
@400000004031e2ac1eb24c9c warning: trouble opening local/7/2813; will try again later
@400000004031e3281f66eae4 warning: trouble opening local/7/2813; will try again later
@400000004031e37420115bb4 warning: trouble opening local/11/2817; will try again later
@400000004031e3a420b4bbec warning: trouble opening local/7/2813; will try again later
@400000004031e3f0215f1164 warning: trouble opening local/11/2817; will try again later
@400000004031e40210efcecc warning: unable to utime local/7/2813; message will be retried too soon
@400000004031e402111f7dd4 warning: unable to utime local/11/2817; message will be retried too soon

I have no idea what this means, if someone has any idea please let me know.
Thanks.