Problems whit [:]

[blumie]

Hi all

I have a question about sendmail. How can i send the [:] character in the body section of my E-Mails?
If I use the [:], then the sendmail send nothing in the body.
This is a example from my program, I use this for send E-Mail whit sendmail.
...
echo "blabla: blabal" >> /tmp/start-mail.$$ (doesn't work)
...

thanks a lot

blumie