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http://bugs.exim.org/show_bug.cgi?id=1201
Summary: forwarding to a content-scanning site is a bounce-
generator
Product: Exim
Version: 4.77
Platform: All
OS/Version: All
Status: NEW
Severity: wishlist
Priority: low
Component: Delivery in general
AssignedTo: nigel@???
ReportedBy: jgh146exb@???
CC: exim-dev@???
Created an attachment (id=535)
--> (
http://bugs.exim.org/attachment.cgi?id=535)
Basic cutthrough routing
The modern world of spammers faking envelope-from combined with antispam
defences doing content-scanning, combined with 2MX service provided by
separately maintained systems, results in a bounce problem.
The attached patches implement an SMTP cutthrough-routing to attack the issue.
The implementation is limited to best-effort, falling back to store-and-forward
on error and on >1 (possibly routing-introduced) recipient. Is is triggered by
a new "control=" recipient-ACL modifier.
The basic facility is added by the "cutthrough" patch, which goes on top of the
refactoring patch offered for bug 1184. The "dual-tls" patch extends the
facility to make TLS connections where appropriate for the delivery.
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