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Old 7 Sep 2017, 01:17 PM   #4
Intergalactic Postmaster
Join Date: May 2004
Location: Irving, Texas
Posts: 8,340
Arrow Partial solutions to complex filtering request

Gmail can forward messages which match certain words and not others, but it doesn't allow the weighting technique you suggested. Try the following:
  • In Gmail navigate to Settings>Filters and Blocked Addresses
  • Create a new filter which has the words "gas invoice truck fuel" and doesn't have "ship waybill ups fedex". Click Continue and select Forward it to: (address 1).
  • Then create another new filter which has the words "ship waybill ups fedex" and doesn't have "gas invoice truck fuel". Click Continue and select Forward it to: (address 2).
  • Any of those words in either the message subject or body will trigger a rule.
    • If any of the "has the words" is present, that rule will be triggered.
    • But if any of the "doesn't have" words is present, the "has the words" forwarding will be overridden and the message will not be forwarded.
So I agree that Gmail can't do exactly what you request. Normal sieve code can't really do the weighting you requested either. But here is what you could do in a system which uses sieve code (such as Fastmail):
  • You could forward messages with any of certain words (gas OR truck OR fuel).
  • You could forward message with all of a list of words (waybill AND ship AND UPS).
  • You could forward a combination of AND and OR:
    (gas OR fuel) AND (ups OR fedex)
  • You can add NOT or other conditions:
    (gas OR fuel) AND (ups OR fedex) BUT NOT from jimmy
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