Strange characters on Subjet and on emil body. Attachments was pasted into the email body, so a PLAIN TEXT email.
The solution was to put a /mime on GWIA.CFG, shutdown gwia and reload GWIA. 100% solved
After creating a new GroupWise system, I found that messages sent in HTML format were delivered in plain text, with a block of HTML code at the bottom. Internal messages were formatted correctly. Reinstalling GWIA didn't fix the problem.
The GWIA defaulted to "uuencoding" instead of to MIME format. Resetting the GWIA to use MIME fixed the problem.