Alias deferred* alias options

Alias options:  (ISO 8601 P time duration string),    (filepath or MTA URL),
The  alias option may be used to add a Deferred-delivery:  header line. The value should be a date and time, in ISO 8601 P format.

The  alias option takes two values, a file specification for a file containing a  list of originator addresses  (or a  URL returning a list of originator  addresses) to whose postings to add a Deferred-delivery: header, and the deferral  date/time in ISO 8601 format.

As of 8.0 (in prior versions, this feature "existed" but was not working), the  alias option may be used to specify a mapping table through which to run originator addresses. The  alias option takes one or two arguments, with a space between if the optional second argument is included. The first argument is required and must contain at a minimum the name of an MTA mapping table; the first argument may also, optionally, include a vertical bar followed by a string to use as a prefix in the mapping table probe, prior to the originator address. The second argument is optional, consisting of a deferral date/time in ISO 8601 format. mapping-name&#x5b;&#x7c;probe-prefix&#x5d; ISO-8601-deferral-time Originator addresses will will be run through the specified mapping. If the mapping template does not begin with an,  ,  , or  ,  and if it contains a valid date/time specification in ISO 8601 format, then that date/time will be used as a deferral time. If the mapping template does not contain a date/time specification yet does not begin with,  ,  , or  ,  then the deferral date/time specified as the second argument to   will be used. The default, if no mapping entry matches, or if an entry that begins  with an ,  ,  , or    matches, is not to  add a Deferred-delivery: header.

Note that the intended purpose of a   is for convenience in using a single MTA mapping table for multiple mailing list deferral settings, e.g., by using a probe prefix consisting of the list name, so that entries in the mapping table may be list specific. Similarly, a deferral time specified as the second argument permits a default deferral time, that may then be overridden in the case of specific originators in the mapping table result.

Setting bit 3/value 8 of the   MTA option  will cause additional information to be included in the input probe of the mapping named by. Thus if a   has also been specified, then the probe will take the form: transport-info&#x7c;application-info&#x7c;probe-prefix&#x7c;originator-address Note that by default the MTA does not honor Deferred-delivery: headers; see the   channel option for a discussion. As a functionally preferable alternative to the Deferred-delivery: header line approach for retaining/deferring messages, see also the SMTP SUBMIT FUTURERELEASE extension.

See also:
 * Alias options
 * Alias file named parameters
 * MTA URL types
 * include_connectioninfo MTA Option
 * deferreddestination Option
 * futurerelease Option
 * ISO 8601 P format
 * ISO 8601 format
 * SMTP SUBMIT FUTURERELEASE support