https://bugs.exim.org/show_bug.cgi?id=2846
Bug ID: 2846
Summary: Support SMTP 251 "corrected destination" responses
Product: Exim
Version: 4.95
Hardware: All
OS: All
Status: NEW
Severity: wishlist
Priority: low
Component: Mail Receipt
Assignee: unallocated@???
Reporter: jgh146exb@???
CC: exim-dev@???
251 User not local; will forward to <forward-path>
SMTP allows for a 2xx variant accepting a message, but advising the
sender that the recipient has moved on. The message would need to be forwarded
after acceptance.
Consider providing builtin support for responding with that. It should be
controllable so that info that should be retained as private is not passed out
unless permitted. We'd have to do an r-verify and discover a redirect.
Consider also the notification side on sending mail: on getting a 251 (vs. 250)
build a DSN for the sender with the new address for their recipient.
Possibly only if RFC 3461 DSN notification is not in use (also, check / add to
generation of such).
There is a 551 response defined in standards, also.
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