Additional Sources of Information

The source for the sendmail program comes with a document by the sendmail program's authors that is required reading. Sendmail Installation and Operations Guide (located in doc/op in the source distribution) provides installation instructions and a succinct description of the configuration file. Many vendors also provide online manuals which might reveal vendor-specific customizations not documented in this book. Also, if you have the source, see the RELEASE_NOTES file and all the */README files.