[xmail] Filter error (-5)

Hi. From the syslog I've read: . XMail[1959]: Filter error (-5): Sender = Please, does it mean time out? Thank you. $ grep -e -5 /usr/src/xmail-1.21/*.h /usr/src/xmail-1.21/Errors.h:#define ERR_TIMEOUT (-5) .

[xmail] filter error -5

I'm seeing this error (filter error (-5)) in the /var/log/messages log on many messages. When this happens the server locks up and we have to reboot it, quickly ssh into it, kill xmail and spamd. spamd is running with an rss of 86M, seems kinda high to me. xmail 1.18 sa 2.63 clamav Pete