Merge pull request #5694 from segmentio/bobbyatsegment-patch-12

Add note on using transformations with filters

Author: forstisabella

src/connections/destinations/destination-filters.md

@@ -229,7 +229,6 @@ Use the destination filter tester during setup to verify that you're filtering o
 
 Destination Filters can't target properties or traits with spaces in the field name. As an alternative, use [Insert Functions](/docs/connections/functions/insert-functions/), which let you write code to take care of such filtering.
 
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 #### Can I use destination filters to drop events unsupported by a destination?
 
 The check for unsupported events types happens before any destination filter checks. As a result, Destination Filters can't prevent unsupported event type errors. To filter these events, use the [Integrations Object](/docs/guides/filtering-data/#filtering-with-the-integrations-object).
@@ -239,3 +238,7 @@ The check for unsupported events types happens before any destination filter che
 Destination filters only filter events sent after filter setup. If you just added a destination filter but still see some events going through, you're likely seeing retries from failed events that occurred before you set up the filter.
 
 When Segment sends an event to a destination but encounters a timeout error, it attempts to send the event again. As a result, if you add a destination filter while Segment is trying to send a failed event, these retries could filter through, since they reflect events that occurred before filter setup.
+
+#### How do destination filters handle Protocols Transformations?
+
+When you enable a destination-specific Transformation, Segment processes your events with a destination filter. Segment processes source-level Transformations before the events reach the destination filter.