SpamAssassin Rule: RCVD_BAD_ID

Standard description: none


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

Further Info

The default scores for this rule can be found 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 RFC 2821 sec 4.4 (which references atext defined in RFC 2822 ) and allows for characters beyond the ASCII alpha/digit/underscore/minus usually seen in IDs.