[Evolution] evolution discloses private information in an email header.

[Eugene <eugene bct bz>]

Comparing Message-Id: header sent while connected to yahoo.com via imap in messages sent by Evolution and 
Thunderbird I discovered that Evolution uses @fqdn or just @hostname if fqdn is not available while 
Thunderbird always uses @yahoo.com.

I am using Evolution to access multiple email accounts with different providers and having my own fqdn in 
every message headers seems just plain unacceptable. Is there a way to remove my fqdn from Message-Id: header 
and use email domain like Thunderbird?

Regards,
Eugene.