The most poular email routing program is sendmail. This article the first in a series will show you how to keep your sendmail program secure. It is excerpted from chapter four of em sendmail fourth edition em written by Bryan Costales Claus Assmann George Jansen and Gregory Shapiro O Reilly 2 7 ISBN 59651 292 . Copyright 2 7 O Reilly Media Inc. All rights reserved. Used with permission from the publisher. Available from booksellers or direct from O Reilly Media….
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