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Unix Insider: Setting up sendmail on a firewall, Part 1

Mar 11, 2001, 12:44 (2 Talkback[s])
(Other stories by Carole Fennelly)

"A tremendous amount of information is available about sendmail. But if you're in a hurry to just get it working, you don't have the time to go through and digest it all. In this first installment in a three-part series on sendmail, Carole discusses its implementation on the firewall and focuses on features new to sendmail 8.9.3...."

"One of the greatest features of sendmail is the extreme flexibility it provides the administrator. This is also one of its worst features, the reason being that it is so often misconfigured. Usually, a system administrator inherits a sendmail configuration file that he or she is afraid to touch, lest it should break. Over time, this file becomes hopelessly confusing, contradictory, and redundant."

"I began writing this column with the intention of providing a simple, straightforward, "sendmail for dummies" approach. I ended up appreciating how Bryan Costales must have felt when he wrote his handbook, Sendmail for O'Reilly & Associates: Nothing is simple in sendmail. I also learned to appreciate just how powerful and flexible sendmail really is. It's worth learning. It's also worth a few columns. I'll devote this month's column to discussing some of the background and new features in sendmail 8.9.3 as well as how to build the source code. Next month we'll look into the configuration file. If there is enough interest, I will add a third column for special situations and testing techniques."

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