Sender management involves coordinating what addresses, groups and networks are able to distribute messages to subscribers through a SYMPA mailing list.
When a list is created it can be configured to operate in different modes -classes of behaviour. This provides the basic framework the list system will use to determine what to do with a message destined for a list it manages.
The outcomes are fairly straightforward:
pass the message on to the subscribers on the target list
hold the message in a pending state and let a moderator make the call on whether to reject, discard or distribute the message. A message is normally sent to the sender advising them that the message is being held.
the message is not distributed, and a response is sent to the sender advising that their message could not be distributed.
the message is silently killed -no notification or response.
Different configurations suit different styles of list, the following are some basic modes.
A list in a public mode will accept and distribute messages from any sender address.
FOS Public -anyone can send
Anyone can send!
Only subscribers (and moderators) can send messages to a list configured as private.
FOS Private -subscribers only, others moderated
messages from non-members are moderated
FOS Private -subscribers only, discard others
messages from non-members are discarded
Moderators can send to the list. Messages from others (including subscribers or members) are moderated.
FOS Moderated for all except owners and moderators
All messages except those from the list moderators and owners, are moderated
FOS Moderated for members, discard others
Messages from members are moderated, others are discarded
Only moderators can send messages to a list configured in this mode. Messages from other senders are rejected (a notification is sent to the sender).
Lists configured for this mode will accept and distribute messages from any University email address, this includes the standard @auckland and @aucklauni addresses used by staff and students, as well as the email addresses associated with subdomains, eg. @cs.auckland, @math.auckland, etc.
FOS Allow any University sender, moderate others
messages from non-UOA senders are moderated
FOS Allow any University sender, discard others
messages from non-UOA senders are discarded
Tweaking the modes
Black and white lists can be used to override the basic behaviour of the list associated with the mode. Each list cam maintain its own black and white lists.
A white list allows a list administrator/moderator to override the basic mode of a list. Addresses (or address templates) added to a white list associated with a list, can send to that list with no moderator intervention required.
A white list is comprised of literal addresses or address templates (eg. *@example.com).
A black list allows a list administrator/moderator to override the basic mode of a list and automatically discard messages coming from specific addresses or address templates. Like a white list, a black list is made up of literal addresses and address templates.
The black list processing has priority over other policy stages. ie. no other policy can override the discard action associated with a match in the black list.