tuning kern.maxproc

[katydid]

Hello.

I have a mail-relay server (qmail). It filtering inbound mail traffic and periodically security run output log inform me 
that:

<... skip ...>

+maxproc limit exceeded by uid 82, please see tuning(7) and login.conf(5).

<... skip ...>

# sysctl kern.maxproc
kern.maxproc: 6164

The problem - inbound mail traffic periodically is huge, inbound queue growing up dramatically and number of incoming 
connections are exhaust (concurrencyincoming = 1000).

DNS, network connectivity etc. are OK.

Is the reason to change kern.maxproc limit ? Or any other recommendation ?

Thanks in advance.

Andrey Oleynikov.
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