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http://bugs.exim.org/show_bug.cgi?id=1030
Summary: Header count limits enforcement
Product: Exim
Version: N/A
Platform: Other
OS/Version: All
Status: NEW
Severity: wishlist
Priority: medium
Component: ACLs
AssignedTo: pdp@???
ReportedBy: pdp@???
CC: exim-dev@???
Per Todd Lyons' mail "RFC 5532 enforcement", we should enforce maximum header
counts.
The actual RFC is 5322, "Internet Message Format". §3.6, "Field Definitions",
contains a table showing min and max counts for various headers.
Exim should have knowledge of this table's contents and be able to react
accordingly. Admins should not have to manually construct rules for RFC
compliance.
Perhaps a global option for enforcement. Perhaps ability to turn on or off
enforcement in the ACL. Should Exim be able to accept such mails and clean
them up, when acting in Submission mode, by applying policies (keep-highest,
keep-lowest, perhaps per-header?) ?
As well as "just reject", if the status can be made available for processing in
the DATA ACL, much as malware= is, that might be interesting.
Come up with a solid design. Implement it.
Comments on this bug which provide use-cases for anything beyond "global
option" are appreciated.
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