Thank you for the video.
I've just retested this with Delphi 7. I supppose I could also make a video, but I hope you'll believe me without one. Here's what I did:
1) Added a 13KB text file into the "mail body" memo in the madExcept settings dialog.
2) Saved the project.
3) Closed Delphi.
4) Opened Delphi.
5) Checked the "mail body" memo. Oooops, the text was cut down!
6) Copied the text to a text file and saved it. File size exactly 10000 bytes.
7) Checked the madExceptWizard.pas/dfm file, which is reponsible for the "mail body" memo. The TMemo field has the "MaxLength" property set to 10000. Oh, it makes sense now!
I don't know what else I can do here...
Which exact Delphi version are you working with? Maybe it only occurs with a specific Delphi version, although I'm not sure why that should be the case...
If you copy & paste the cut down text from the memo into a text file and save that text file to harddisk, how big (in bytes) is that file exactly?