savemail panic

[K. Yura]

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 FreeBSD .dlink 8.1-RELEASE FreeBSD 8.1-RELEASE #1: Tue Nov  9 21:13:03 MSK
2010     root at .dlink:/usr/obj/usr/src/sys/GENERIC  i386
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df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad0s1a    496M    476M    -20M   104%    /
devfs          1.0K    1.0K      0B   100%    /dev
/dev/ad0s1e    496M     12K    456M     0%    /tmp
/dev/ad0s1f     22G    5.5G     15G    27%    /usr
/dev/ad0s1d    1.2G     39M    1.1G     3%    /var
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I got that error SYSERR(root): savemail: cannot save rejected email anywhere
Losing ./qfob86....:savemail panic. How can I fix it? Thanks.