GNARWL - LDAP based email autoresponder

Gnarwl is an autoresponder software, written to replace the legacy vacation(1) tool, which is included in most unix server distributions. With the traditional vacation(1) tool, users had to be given full shell accounts on the email server and trained in using them. This had serious implications on usability, working time and network security policy.
In essence, from a network management point of view, users should never be allowed or forced to access systems, they can easily break or compromise (both accidentally or on purpose). They should especially not have to use arcane tools, that are not part of their daily routine. As, according to experience, this only results in an additional amount of work for the network support team.

Since modern email server setups typically include an LDAP database server as a backend for storing actual user objects, it only makes sense to move vacation specific information from flat files to LDAP as well, in order to ease network management. That is, the user object in the database should also contain the users' out of office settings. That way, the same administrative interface, that is already in place for account management (changing passwords, etc.) can simply be extended to include absentee notification settings, sparing training and security issues.

Gnarwl makes the process of generating out of office notifications easy by plugging into the email server and inspecting every piece of incoming mail, checking it against the LDAP database and sending an automatic reply when necessary.

Gnarwl features:

  • Fully compatible with the old vacation(1) tool. Gnarwl can be used as a drop in replacement.
  • Careful about not creating mail loops by answering to mailing lists or other automated user agents.
  • Configurable blacklist of corporate email addresses for which to never send out vacation notifications, even if an associated user is out of office (e.g. webmaster@...).
  • Works with all major mail transport agents (postfix, sendmail and qmail).
  • Highly configurable output generation. Gnarwl allows the administrator to force headers and footers, users may reference fields of their own LDAP object in the outgoing mail.
  • Unicode support.
  • GPL software.

See Also


FilenameSizeMD5 Checksum
gnarwl-3.6.tgz71 KB832d1e2264b7e47d318b16795d63da8e
gnarwl-3.5.tgz71 KBe1289ede5048d75a9456360098c0948c
gnarwl-3.4.tgz72 KB166dbe369074ea1d94443a8c2ddfb75e
gnarwl-3.3.tgz66 KBec2bb56301988e300741eec8190b165e
gnarwl-3.2.tgz69 KB59a5fc3ae48051eac76bc6a8644d8fad
gnarwl-3.1.tgz65 KB0e893eb73d271a0a3415d2254def7d50
gnarwl-3.0.tgz64 KBb501857a3d1f2dd36a4b745363bf1afe