Milter problem with Puremessage for Unix

Hello

We have had a long-running PureMessage for Unix setup but now today the server just stopped to accept mail. Or rather, it accepts it, but the milter doesn't so the mail comes into the server, but forwarding it to milter doesn't work, it just gives

"PureMessage::Milter::Policy: status write() to parent failed for slot 0"

Milter listens 100025 and talks from 100026

and in the mail-log I get

xxx postfix/smtp[5349]: 81F0A17BD332: to=<yyyy.zz@domain.com>, relay=127.0.0.1[127.0.0.1]:10025, delay=7951, delays=2280/5190/0/480, dsn=4.0.0, status=deferred (host 127.0.0.1[127.0.0.1] said: 450 try later (in reply to end of DATA command))

I have restarted the Milter-service but it dodn't help.

Ane pointers how to proceed or what further information to dig needed a lot...

Some people here are quite angry, so I would appreciate fast answers to deflect their baseball bats.. ;)

wbr, hank