Hi, On Tue, Aug 15, 2023 at 11:02 AM Wietse Venema via Postfix-users < postfix-users@postfix.org> wrote:
> Your loop, based on Received: headers, newer at the top, older at > the bottom: > > Received: from xavier.example.com (209.216.111.114) by > CO1PEPF000044F7.mail.protection.outlook.com (10.167.241.197) with > Microsoft S > Received: from localhost by xavier.example.com (Postfix) with ESMTP id > 30B17305F4A07; Fri, 11 Aug 2023 11:57:49 -0400 (EDT) > Received: from xavier.example.com ([209.216.111.115]) by localhost > (amavis, port 11024) with ESMTP id HL0GE5Q4v_xp; Fri, 11 Aug 2023 > Received: from NAM11-BN8-obe.outbound.protection.outlook.com (using > TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) > Received: from CY5PR04CA0018.namprd04.prod.outlook.com by > SA1PR02MB9916.namprd02.prod.outlook.com (2603:10b6: > Received: from CY4PEPF0000EE3E.namprd03.prod.outlook.com by > CY5PR04CA0018.outlook.office365.com (2603:10 > Received: from xavier.example.com (209.216.111.114) by > CY4PEPF0000EE3E.mail.protection.outlook.com (10.167.242.18) with > Microsoft SM > > In summary: > > 1 xavier.example.com ([209.216.111.114]) sends a message to Microsoft > > 2 After some internal hops, Microsoft sends the message to the > inbound MX xavier.example.com (209.216.111.115) for company A, B, > which filters it with amavis. > > 3 GOTO 1. > > Which step is in error? > We are relay for both companyA and companyB. Both are also on M365, so mail originates from M365 at companyA, goes through our xavier, then out to M365 at companyB. I also see five relay=companyB entries in the logs, but companyB doesn't report ever receiving five copies. Thanks so much, Alex
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