[exim-dev] [Bug 1545] New: Want domain-based retry rules

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http://bugs.exim.org/show_bug.cgi?id=1545
           Summary: Want domain-based retry rules
           Product: Exim
           Version: 4.84
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: wishlist
          Priority: medium
         Component: Delivery in general
        AssignedTo: nigel@???
        ReportedBy: jgh146exb@???
                CC: exim-dev@???

The retry entries stored currently are per-destination IP. This fails when
faced with gmail, which shows a large number (5) of MXs, most of which have
both
A and AAAA records, with small (300) TTL... and rotates the IPs it returns for
A-lookups.

The result is a delivery attempt on every queue-run, whatever the retry rule
places in the db entry for "next try at".

Possibly a marker on the db entry destination IP for "any" would do as an
implementation. For the rule syntax, we could expand the third "senders"
entry to be a list of constraints and accept "hosts=*" as well as the current
"senders=<host list>"


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