So sorgt ein vom mail-zustellenden Programm zurückgegebener Exit-Code von 75 (== EX_TEMPFAIL) dafür, daß die Mail nicht als unzustellbar zurückgeschickt wird, sondern in der Zustellungs-Queue verbleibt.

Auf Rechner, die zum Übersetzen von C-Programmen installiert/konfiguriert sind, sollten sich die folgenden Informationen in /usr/include/sysexits.h wiederfinden lassen.

/*
 * Copyright (c) 1987, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 *	$Id: sysexits.h,v 8.5 2000/11/26 02:13:20 ca Exp $
 *	@(#)sysexits.h	8.1 (Berkeley) 6/2/93
 */

#ifndef _SYSEXITS_H_
# define _SYSEXITS_H_

/*
**  SYSEXITS.H -- Exit status codes for system programs.
**
**	This include file attempts to categorize possible error
**	exit statuses for system programs, notably delivermail
**	and the Berkeley network.
**
**	Error numbers begin at EX__BASE to reduce the possibility of
**	clashing with other exit statuses that random programs may
**	already return.  The meaning of the codes is approximately
**	as follows:
**
**	EX_USAGE -- The command was used incorrectly, e.g., with
**		the wrong number of arguments, a bad flag, a bad
**		syntax in a parameter, or whatever.
**	EX_DATAERR -- The input data was incorrect in some way.
**		This should only be used for user's data & not
**		system files.
**	EX_NOINPUT -- An input file (not a system file) did not
**		exist or was not readable.  This could also include
**		errors like "No message" to a mailer (if it cared
**		to catch it).
**	EX_NOUSER -- The user specified did not exist.  This might
**		be used for mail addresses or remote logins.
**	EX_NOHOST -- The host specified did not exist.  This is used
**		in mail addresses or network requests.
**	EX_UNAVAILABLE -- A service is unavailable.  This can occur
**		if a support program or file does not exist.  This
**		can also be used as a catchall message when something
**		you wanted to do doesn't work, but you don't know
**		why.
**	EX_SOFTWARE -- An internal software error has been detected.
**		This should be limited to non-operating system related
**		errors as possible.
**	EX_OSERR -- An operating system error has been detected.
**		This is intended to be used for such things as "cannot
**		fork", "cannot create pipe", or the like.  It includes
**		things like getuid returning a user that does not
**		exist in the passwd file.
**	EX_OSFILE -- Some system file (e.g., /etc/passwd, /etc/utmp,
**		etc.) does not exist, cannot be opened, or has some
**		sort of error (e.g., syntax error).
**	EX_CANTCREAT -- A (user specified) output file cannot be
**		created.
**	EX_IOERR -- An error occurred while doing I/O on some file.
**	EX_TEMPFAIL -- temporary failure, indicating something that
**		is not really an error.  In sendmail, this means
**		that a mailer (e.g.) could not create a connection,
**		and the request should be reattempted later.
**	EX_PROTOCOL -- the remote system returned something that
**		was "not possible" during a protocol exchange.
**	EX_NOPERM -- You did not have sufficient permission to
**		perform the operation.  This is not intended for
**		file system problems, which should use NOINPUT or
**		CANTCREAT, but rather for higher level permissions.
*/

# define EX_OK		0	/* successful termination */

# define EX__BASE	64	/* base value for error messages */

# define EX_USAGE	64	/* command line usage error */
# define EX_DATAERR	65	/* data format error */
# define EX_NOINPUT	66	/* cannot open input */
# define EX_NOUSER	67	/* addressee unknown */
# define EX_NOHOST	68	/* host name unknown */
# define EX_UNAVAILABLE	69	/* service unavailable */
# define EX_SOFTWARE	70	/* internal software error */
# define EX_OSERR	71	/* system error (e.g., can't fork) */
# define EX_OSFILE	72	/* critical OS file missing */
# define EX_CANTCREAT	73	/* can't create (user) output file */
# define EX_IOERR	74	/* input/output error */
# define EX_TEMPFAIL	75	/* temp failure; user is invited to retry */
# define EX_PROTOCOL	76	/* remote error in protocol */
# define EX_NOPERM	77	/* permission denied */
# define EX_CONFIG	78	/* configuration error */

# define EX__MAX	78	/* maximum listed value */

#endif /* ! _SYSEXITS_H_ */

Die auf diesen Seiten zum Ausdruck gebrachten Meinungen sind die meinigen, nicht notwendigerweise die der Universität Osnabrück. (Es sei denn, sie würden zufällig übereinstimmen oder wären entsprechend gekennzeichnet.)

Zum Thema "Links":

Bei "Links" handelt es sich stets um "lebende" (dynamische) Verweisungen. Gernot Skalla hat bei der erstmaligen Verknüpfung zwar den fremden Inhalt daraufhin überprüft, ob durch ihn eine mögliche zivilrechtliche oder strafrechtliche Verantwortlichkeit ausgelöst wird. Er überprüft aber die Inhalte, auf die er in seinem Angebot verweist, nicht ständig auf Veränderungen, die eine Verantwortlichkeit neu begründen könnten. Wenn er feststellt oder von anderen darauf hingewiesen wird, daß ein konkretes Angebot, zu dem er einen Link bereitgestellt hat, eine zivil- oder strafrechtliche Verantwortlichkeit auslöst, wird er den Verweis auf dieses Angebot aufheben.