webmail gpg/pgp question

[user1]

Hi, 

In webmail, how can I decrypt a message sent by someone with PGP7.03?
The message comes in a text in the body:
 -----BEGIN PGP MESSAGE-----
Version: PGPfreeware 7.0.3 for non-commercial use <http://www.pgp.com>
...... 

When I send a encrypted message to a user without sqwebmail, he sees the 
message as a ATT0001.dat attachement and cannot decode it with PGP7. How can 
we send the encrypted message in the body or in a file named message.asc? 

Thank you very much. 

Bill