?? In fact, old versions of the GNU emacs(1) mail reader delete those lines irrevocably.
This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
4.8 Security Features | 173
To improve security at our location you are requested to immediately
change your password. The password you have been assigned is:
7Fuzzy1's
Thank you,
--root
Clearly, a user who sees only this much of the mail message will be more likely to
believe that it is real. There are several ways you can educate your users that mail can
be forged:
??? Teach users what to look for when they receive a message of questionable
authenticity.
??? Rarely, if ever, send mail as root. Always communicate as yourself and always
use a distinctive style of writing. If users never see mail from root, they will be
more likely to question such mail when it arrives. Even if the forger pretends to
be you, that forger will likely not be in a position to imitate your distinctive writing
style.
??? Train users to never send (or ask to receive) clear-text passwords or other
security-related information by email.
??? Train users to use digital signatures, suchas PGP or S/MIME, to authenticate
email contents.
4.8 Security Features
We now turn our attention from security problems to security features. Many security
features are discussed in the various README files supplied withth e sendmail
source distribution.
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