Maximum encrypted message size

Hi all,
What is the largest size message that can be encrypted by the IronPort ESA PXE engine?  Is this a configurable parameter?
Thanks very much,
- Steve

I came to this thread after one of my users had a message bounce that was only about 7.2MB.
I understand Cisco wants to cut down on support calls and costs but this seems like a drastic reduction.  We're a very small shop and rarely send out messages of any kind over 10MB but it's the big ones that are usually the most sensitive, yes?  I would very much like to see this limit at least somewhat configurable in the future, even if it's capped at, say, 20MB, or even maybe see it indexed on throughput but effectively cutting the limit of what can be protected by 75% or more puts a huge dent in the value argument for IronPort.  The ability to easily encrypt anything from any device is the prime reason we have IronPort versus numerous other options.
We renewed this year but if this is not addressed it will put a serious damper on our enthusiasm to spend the extra cash next year.

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