Problem: Empty Lines betwenn my Message

[WebSide]

Hello,
I have a problem with the messages i send. For example i have following Test

asdf asdfasdf asdf
asdfasdfsdf asdfasdf sdf sdf asdf
asdfsadf fdsdfsdf sdf dsf sdfsdfsd

asdfasdf

Then the receipent get following message:

asdf asdfasdf asdf

asdfasdfsdf asdfasdf sdf sdf asdf

asdfsadf fdsdfsdf sdf dsf sdfsdfsd


asdfasdf

Why is that? What can i do, that the message have my text without the empty lines?

Thanks and best regards.

[WebSide]

Can nobody help me with my problem?