problem sending email from 4.6C system

Hello,

I'm trying to send an email with a pdf-attachment from my 46C system. In trans SOST everything looks fine. There is a document with an attachment. When I send it to my email-client there's no attachment. And the following message is given in my email:

This message is in MIME format. Your mail reader does not support MIME. Please read the first section, which is plain text, and ignore the rest. Better yet, get a MIME-capable mail reader.