Hello, I'm trying to filter messages that are response to Disposition Notifications. I've seen that this kind of messages contains the following header: Content-Type: multipart/report; report-type=disposition-notification; boundary="----=_NextPart_000_015A_01C7A9BD.EA993250" So I've tried to filter incoming messages by Content-Type header 1st, I've created a new PostMaster X-Header to be scanned for Content-Type header 2nd, I've created the following PostMaster Filter rule, that is processed for first Corrispondenza: Intestazione (header) 1: - Body Cc Content-Type Delivered-To Errors-To From Importance In-Reply-To List-Archive List-Id Mailing-List Message-ID Message-Id Organization Precedence References Reply-To ReplyTo Resent-From Resent-To Subject To User-Agent X-Loop X-Mailer X-No-Loop X-OTRS-ArticleKey1 X-OTRS-ArticleKey2 X-OTRS-ArticleKey3 X-OTRS-ArticleType X-OTRS-ArticleValue1 X-OTRS-ArticleValue2 X-OTRS-ArticleValue3 X-OTRS-CustomerNo X-OTRS-CustomerUser X-OTRS-FollowUp-ArticleKey1 X-OTRS-FollowUp-ArticleKey2 X-OTRS-FollowUp-ArticleKey3 X-OTRS-FollowUp-ArticleType X-OTRS-FollowUp-ArticleValue1 X-OTRS-FollowUp-ArticleValue2 X-OTRS-FollowUp-ArticleValue3 X-OTRS-FollowUp-Priority X-OTRS-FollowUp-Queue X-OTRS-FollowUp-SenderType X-OTRS-FollowUp-State X-OTRS-FollowUp-TicketKey1 X-OTRS-FollowUp-TicketKey10 X-OTRS-FollowUp-TicketKey11 X-OTRS-FollowUp-TicketKey12 X-OTRS-FollowUp-TicketKey13 X-OTRS-FollowUp-TicketKey14 X-OTRS-FollowUp-TicketKey15 X-OTRS-FollowUp-TicketKey16 X-OTRS-FollowUp-TicketKey2 X-OTRS-FollowUp-TicketKey3 X-OTRS-FollowUp-TicketKey4 X-OTRS-FollowUp-TicketKey5 X-OTRS-FollowUp-TicketKey6 X-OTRS-FollowUp-TicketKey7 X-OTRS-FollowUp-TicketKey8 X-OTRS-FollowUp-TicketKey9 X-OTRS-FollowUp-TicketValue1 X-OTRS-FollowUp-TicketValue10 X-OTRS-FollowUp-TicketValue11 X-OTRS-FollowUp-TicketValue12 X-OTRS-FollowUp-TicketValue13 X-OTRS-FollowUp-TicketValue14 X-OTRS-FollowUp-TicketValue15 X-OTRS-FollowUp-TicketValue16 X-OTRS-FollowUp-TicketValue2 X-OTRS-FollowUp-TicketValue3 X-OTRS-FollowUp-TicketValue4 X-OTRS-FollowUp-TicketValue5 X-OTRS-FollowUp-TicketValue6 X-OTRS-FollowUp-TicketValue7 X-OTRS-FollowUp-TicketValue8 X-OTRS-FollowUp-TicketValue9 X-OTRS-Ignore X-OTRS-Info X-OTRS-Loop X-OTRS-Priority X-OTRS-Queue X-OTRS-SenderType X-OTRS-State X-OTRS-TicketKey1 X-OTRS-TicketKey10 X-OTRS-TicketKey11 X-OTRS-TicketKey12 X-OTRS-TicketKey13 X-OTRS-TicketKey14 X-OTRS-TicketKey15 X-OTRS-TicketKey16 X-OTRS-TicketKey2 X-OTRS-TicketKey3 X-OTRS-TicketKey4 X-OTRS-TicketKey5 X-OTRS-TicketKey6 X-OTRS-TicketKey7 X-OTRS-TicketKey8 X-OTRS-TicketKey9 X-OTRS-TicketValue1 X-OTRS-TicketValue10 X-OTRS-TicketValue11 X-OTRS-TicketValue12 X-OTRS-TicketValue13 X-OTRS-TicketValue14 X-OTRS-TicketValue15 X-OTRS-TicketValue16 X-OTRS-TicketValue2 X-OTRS-TicketValue3 X-OTRS-TicketValue4 X-OTRS-TicketValue5 X-OTRS-TicketValue6 X-OTRS-TicketValue7 X-OTRS-TicketValue8 X-OTRS-TicketValue9 X-Original-To X-Priority X-Spam-Flag X-Spam-Level X-Spam-Status Valore: Impostazione: Intestazione (header) 1: - X-OTRS-ArticleKey1 X-OTRS-ArticleKey2 X-OTRS-ArticleKey3 X-OTRS-ArticleType X-OTRS-ArticleValue1 X-OTRS-ArticleValue2 X-OTRS-ArticleValue3 X-OTRS-CustomerNo X-OTRS-CustomerUser X-OTRS-FollowUp-ArticleKey1 X-OTRS-FollowUp-ArticleKey2 X-OTRS-FollowUp-ArticleKey3 X-OTRS-FollowUp-ArticleType X-OTRS-FollowUp-ArticleValue1 X-OTRS-FollowUp-ArticleValue2 X-OTRS-FollowUp-ArticleValue3 X-OTRS-FollowUp-Priority X-OTRS-FollowUp-Queue X-OTRS-FollowUp-SenderType X-OTRS-FollowUp-State X-OTRS-FollowUp-TicketKey1 X-OTRS-FollowUp-TicketKey10 X-OTRS-FollowUp-TicketKey11 X-OTRS-FollowUp-TicketKey12 X-OTRS-FollowUp-TicketKey13 X-OTRS-FollowUp-TicketKey14 X-OTRS-FollowUp-TicketKey15 X-OTRS-FollowUp-TicketKey16 X-OTRS-FollowUp-TicketKey2 X-OTRS-FollowUp-TicketKey3 X-OTRS-FollowUp-TicketKey4 X-OTRS-FollowUp-TicketKey5 X-OTRS-FollowUp-TicketKey6 X-OTRS-FollowUp-TicketKey7 X-OTRS-FollowUp-TicketKey8 X-OTRS-FollowUp-TicketKey9 X-OTRS-FollowUp-TicketValue1 X-OTRS-FollowUp-TicketValue10 X-OTRS-FollowUp-TicketValue11 X-OTRS-FollowUp-TicketValue12 X-OTRS-FollowUp-TicketValue13 X-OTRS-FollowUp-TicketValue14 X-OTRS-FollowUp-TicketValue15 X-OTRS-FollowUp-TicketValue16 X-OTRS-FollowUp-TicketValue2 X-OTRS-FollowUp-TicketValue3 X-OTRS-FollowUp-TicketValue4 X-OTRS-FollowUp-TicketValue5 X-OTRS-FollowUp-TicketValue6 X-OTRS-FollowUp-TicketValue7 X-OTRS-FollowUp-TicketValue8 X-OTRS-FollowUp-TicketValue9 X-OTRS-Ignore X-OTRS-Info X-OTRS-Loop X-OTRS-Priority X-OTRS-Queue X-OTRS-SenderType X-OTRS-State X-OTRS-TicketKey1 X-OTRS-TicketKey10 X-OTRS-TicketKey11 X-OTRS-TicketKey12 X-OTRS-TicketKey13 X-OTRS-TicketKey14 X-OTRS-TicketKey15 X-OTRS-TicketKey16 X-OTRS-TicketKey2 X-OTRS-TicketKey3 X-OTRS-TicketKey4 X-OTRS-TicketKey5 X-OTRS-TicketKey6 X-OTRS-TicketKey7 X-OTRS-TicketKey8 X-OTRS-TicketKey9 X-OTRS-TicketValue1 X-OTRS-TicketValue10 X-OTRS-TicketValue11 X-OTRS-TicketValue12 X-OTRS-TicketValue13 X-OTRS-TicketValue14 X-OTRS-TicketValue15 X-OTRS-TicketValue16 X-OTRS-TicketValue2 X-OTRS-TicketValue3 X-OTRS-TicketValue4 X-OTRS-TicketValue5 X-OTRS-TicketValue6 X-OTRS-TicketValue7 X-OTRS-TicketValue8 X-OTRS-TicketValue9 Valore: But I've got no result, the filter is not applied. Can someone tell me why this is not working? Or alternatively suggest a better method? I need to filter and ignore messages that are replies to Disposition notifications Thank you for any help -- Gabriele D'Andrea