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-rw-r--r--doc/administration/incoming_email.md3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/administration/incoming_email.md b/doc/administration/incoming_email.md
index 95301ec026a..9351a101ee4 100644
--- a/doc/administration/incoming_email.md
+++ b/doc/administration/incoming_email.md
@@ -75,11 +75,12 @@ Email is processed correctly when a configured email address is present in one o
(sorted in the order they are checked):
- `To`
-- `References`
- `Delivered-To`
- `Envelope-To` or `X-Envelope-To`
- `Received`
+The `References` header is also accepted, however it is used specifically to relate email responses to existing discussion threads. It is not used for creating issues by email.
+
In GitLab 14.6 and later, [Service Desk](../user/project/service_desk.md)
also checks accepted headers.