docs/63780: Some fixs in the mail chapter of the handbook

[Marc Fonvieille]

Synopsis: Some fixs in the mail chapter of the handbook

State-Changed-From-To: open->closed
State-Changed-By: blackend
State-Changed-When: Sun Mar 7 12:51:06 PST 2004
State-Changed-Why: 
I committed a slightly different version of your patch, Ceri also fixed
some issues.  Thanks.

http://www.freebsd.org/cgi/query-pr.cgi?pr=63780