SMM:08-74
Sendmail Installation and Operation Guide
RefuseLA=LA
[X] When the system load average exceeds LA, refuse incoming SMTP connec-
tions. Defaults to 12 multiplied by the number of processors online on the system
(if that can be determined).
RejectLogInterval=timeout
[no short name] Log interval when refusing connections for this long (default:
3h).
RetryFactor=fact [Z] The factor is added to the priority every time a job is processed. Thus, each
time a job is processed, its priority will be decreased by the indicated value. In
most environments this should be positive, since hosts that are down are all too
often down for a long time. Defaults to 90000.
SafeFileEnvironment=dir
[no short name] If this option is set, sendmail will do a chroot(2) call into the indi-
cated directory before doing any file writes. If the file name specified by the user
begins with dir, that partial path name will be stripped off before writing, so (for
example) if the SafeFileEnvironment variable is set to "/safe" then aliases of
"/safe/logs/file" and "/logs/file" actually indicate the same file. Additionally, if
this option is set, sendmail refuses to deliver to symbolic links.
SaveFromLine [f] Save UNIX-style "From" lines at the front of headers. Normally they are
assumed redundant and discarded.
SharedMemoryKey
[no short name] Key to use for shared memory segment; if not set (or 0), shared
memory will not be used. Requires support for shared memory to be compiled
into sendmail. If this option is set, sendmail can share some data between differ-
ent instances. For example, the number of entries in a queue directory or the
available space in a file system. This allows for more efficient program execution,
since only one process needs to update the data instead of each individual process
gathering the data each time it is required.
SendMimeErrors [j] If set, send error messages in MIME format (see RFC 2045 and RFC 1344 for
details). If disabled, sendmail will not return the DSN keyword in response to an
EHLO and will not do Delivery Status Notification processing as described in
RFC 1891.
ServerCertFile
[no short name] File containing the certificate of the server, i.e., this certificate is
used when sendmail acts as server (used for STARTTLS).
ServerKeyFile
[no short name] File containing the private key belonging to the server certificate
(used for STARTTLS).
ServiceSwitchFile=filename
[no short name] If your host operating system has a service switch abstraction
(e.g., /etc/nsswitch.conf on Solaris or /etc/svc.conf on Ultrix and DEC OSF/1) that
service will be consulted and this option is ignored. Otherwise, this is the name
of a file that provides the list of methods used to implement particular services.
The syntax is a series of lines, each of which is a sequence of words. The first
word is the service name, and following words are service types. The services
that sendmail consults directly are "aliases" and "hosts." Service types can be
"dns", "nis", "nisplus", or "files" (with the caveat that the appropriate support
must be compiled in before the service can be referenced). If ServiceSwitchFile
is not specified, it defaults to /etc/mail/service.switch. If that file does not exist,
the default switch is:
aliases files
hosts dns nis
files