Posible DoS or amavis bug ???

[UnKnown <rak@burst.fcien.edu.uy>]

Hi every one:

In one of the servers im working we recive the following message from the
logcheck

Jun  9 10:20:38 minerva amavisd[1470]: decoding failed, retry: Possible DoS
detected - mail requeued at /usr/sbin/amavis line 834.
+(message-id=<000901c32d9e$47b60620$d59049a4@fmed.edu.uy>)

we use amavis 0.3 with exim checking in-comming and out-going mail. The
antivirus is McAfee Virus Scan for Linux v 4.16.0
It could be the BugBear that hit hard today but i wont to check if someone
else had some expirience with this.

Thx to u all,
		rak