Topic Path: Symbol Reference > Classes > TMINFORecord Class
TMINFORecord Class

Represents a resource record returned from a DNS query that includes mailbox or mailing list resource record types.

TMINFORecord = class(TResultRecord);

TMINFORecord is a TResultRecord descendant that represents a resource record returned in the results for a DNS query. TMINFORecord is a collection item created to represent a resource record returned when TIDNSResolver.QueryRecords includes the value qtMINFO for Mailbox Information resource records. 

MINFO resource records are an experimental record type used to represent mailbox addresses for both the maintainer and error logging facilities for a mailing list or email address specified in the owner. 

An MINFO resoure record uses the same DNS packet layout as other TResultRecord-based responses, but extends the use of RData to include the following definition and format: 


  • RMAILBX - Domain name which specifies a mailbox which is responsible for the mailing list or mailbox. If this domain name names the root, the owner of the MINFO Resource Record is responsible for itself. Many existing mailing lists use a mailbox X-request for the RMAILBX field of mailing list X, e.g., Msgroup-request for Msgroup. This field provides a more general mechanism.

  • EMAILBX - Domain name which specifies a mailbox used to receive error messages related to the mailing list or mailbox specified by the owner of the MINFO Resource Record (similar to the ERRORS-TO: field which has been proposed). If this domain name names the root, errors should be returned to the sender of the message.

Although MINFO resource record can be associated with a simple mailbox, they are usually used with a mailing list address. 

TMINFORecord extends TTextRecord to implement the specifics of accessing RData values as properties, including ResponsiblePersonMailbox and ErrorMailbox

TMINFORecord also overrides the Parse method to read the values in RData into their property counterparts.

TResultRecord TQueryResult TIdDNSResolver.QueryRecords

Copyright 1993-2006, Chad Z. Hower (aka Kudzu) and the Indy Pit Crew. All rights reserved.
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