emails with long body text are not picked up

Hello
Am i the only one like this?
On the course of a case resolution we might have many email exchanges…
The multimple emails will copy in the thread/body of the email .

First problem it appears that the empy lines from the previous email is duplicated having an exponential effect on email thread/history…
as you can see here :

then the MAJOR problem will arise, when the email body have many lines 6236 in my example the message is simply not picked up by crm case creation/update…
the email remains in the inbox as read (thanks God!).

I am not sure if it is related to that number of characters or the number of lines…

Does anybody is experiencing this as well?

Where should I look for a solution? php.ini?
Thank you

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