#language en
== SpamAssassin Rule: RCVD_BAD_ID ==

''Standard description:'' none

=== Explanation ===

One of the trace fields (Received: headers) contains an unusually formatted ID parameter.

=== Further Info ===

The default scores for this rule can be found [[http://spamassassin.apache.org/tests.html|in the online list of tests]].

Note: matching this rule does not necessarily infer that the Received: header
is invalid or non-standard, only unusual.

The format of the Received: header is defined in
[[http://tools.ietf.org/html/rfc2821#section-4.4|RFC 2821 sec 4.4]]
(which references ''atext'' defined in
[[http://tools.ietf.org/html/rfc2822|RFC 2822]]
) and allows for characters beyond the ASCII alpha/digit/underscore/minus usually seen in IDs.

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