[Evolution] I can not send email!!

[mafelix softhome net]

Hi, 

I am running Evolution 1.2 on Red Hat 9 and trying to use it to 
send/receive mail. Upon correct POP/SMTP configuration when I try to send an 
email(receiving is OK) I get the following error message: 

Error while performing operation
Host lookup failed: http: host not found 

The identical configuration in Mozilla Mail works flawlessly! I do not know 
what is the problem!! 

Thanks, Felix