Content title's link in the mail not working

Hi all.
I got a drupal 4.7.5 installation.
The mail.module works correctly and all mails are sent.
But the title of the content sent via mail displays a bad link (ex: http:///node/xxx)
I tryed to fix it in mail.module but wasn't able to do it. :(
How can i fix??

And i got another problem: attachments are not sent with mail.... are displayed on the site node, but not sent via mail.

Thank you all for help
(and excuse for any error... )