[exim] Timeouts with Spamassassin 3.1.0 on particular mail i…

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We use SA with exim 4.52 .

After upgrading to SA 3.1.0 we've seen a very few mails timeout every time
they are offered to spamd. Initially this appeared to be an issue with the
number of forked spamds but having adjusted this, we are still seeing
certain mails timeout consistently (they are deferred after the end of
DATA).

We have perl 5.6.1 and had no problems with previous versions.

Is anyone else seeing this?

Thanks

Alan Thew