------- You are receiving this mail because: -------
You are on the CC list for the bug.
Summary: forwarding to a content-scanning site is a bounce-
Component: Delivery in general
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.