Received: from PCH.mit.edu (18.7.21.50) by mail.efplus.com (192.168.0.8) with Microsoft SMTP Server (TLS) id 8.3.485.1; Mon, 7 Jun 2021 05:17:10 -0700 Received: from PCH.MIT.EDU (localhost.localdomain [127.0.0.1]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 157C6S9H022767; Mon, 7 Jun 2021 08:07:09 -0400 Received: from outgoing-exchange-1.mit.edu (OUTGOING-EXCHANGE-1.MIT.EDU [18.9.28.15]) by PCH.mit.edu (8.14.7/8.12.8) with ESMTP id 157C6QlE022732 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL) for ; Mon, 7 Jun 2021 08:06:27 -0400 Received: from w92exedge3.exchange.mit.edu (W92EXEDGE3.EXCHANGE.MIT.EDU [18.7.73.15]) by outgoing-exchange-1.mit.edu (8.14.7/8.12.4) with ESMTP id 157C6H3p002207 for ; Mon, 7 Jun 2021 08:06:26 -0400 Received: from w92extsm2.exchange.mit.edu (18.7.74.56) by w92exedge3.exchange.mit.edu (18.7.73.15) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 7 Jun 2021 08:05:22 -0400 Received: from oc11exhyb3.exchange.mit.edu (18.9.1.99) by w92extsm2.exchange.mit.edu (18.7.74.56) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Mon, 7 Jun 2021 08:06:16 -0400 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (104.47.56.175) by oc11exhyb3.exchange.mit.edu (18.9.1.99) with Microsoft SMTP Server (TLS) id 15.0.1497.18 via Frontend Transport; Mon, 7 Jun 2021 08:06:16 -0400 Received: from CO2PR05CA0097.namprd05.prod.outlook.com (2603:10b6:104:1::23) by SA1PR01MB6638.prod.exchangelabs.com (2603:10b6:806:1a3::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4195.24; Mon, 7 Jun 2021 12:06:15 +0000 Received: from CO1NAM11FT033.eop-nam11.prod.protection.outlook.com (2603:10b6:104:1:cafe::37) by CO2PR05CA0097.outlook.office365.com (2603:10b6:104:1::23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4219.12 via Frontend Transport; Mon, 7 Jun 2021 12:06:15 +0000 Received: from mulvey.us (24.169.71.174) by CO1NAM11FT033.mail.protection.outlook.com (10.13.174.247) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.20.4195.22 via Frontend Transport; Mon, 7 Jun 2021 12:06:14 +0000 Received: from [192.168.100.55] ([192.168.100.55]) by mulvey.us with MailEnable ESMTPSA (version=TLS1_2 cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P256); Mon, 7 Jun 2021 08:06:12 -0400 From: Allen Mulvey To: "piclist@mit.edu" Sender: "piclist-bounces@mit.edu" Date: Mon, 7 Jun 2021 05:06:12 -0700 Subject: [OT]Re: testing - is anybody there? Thread-Topic: [OT]Re: testing - is anybody there? Thread-Index: AddblwsghY6Nu6yLTZK8ai1GhkifeA== Message-ID: References: <20210606232246.6237a8d2@raspberry> List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: <20210606232246.6237a8d2@raspberry> Reply-To: Microcontroller discussion list - Public. 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My mail server, MailEnable, lets me=20 decide if a reply is sent and to whom. In the case of a virus having=20 been found I send the response to myself. Allen Mulvey On 6/6/2021 6:22 PM, Alan Pearce wrote: > No, I'm not here, I've gone to bed ... > Its late in the UK now ... :)) > > > On Sun, 6 Jun 2021 23:53:31 +0100 (BST) > smplx wrote: > >> Hi All, >> >> I'm afraid I've been off the air for a few weeks while trying to sort >> out my email. It might seem strange to many that it would take anyone >> this long but I wanted to put the mail server inside its own VM >> behind a firewall. It turns out that doing this is a problem if you >> want the mail server to be able to reject spoofed email at the >> "connect" stage (before it gets queued). Once an email is accepted >> and placed in a queue, protocol dictates that a subsequent rejection >> involves sending a message back to the sender. If the sender's >> address was spoofed then YOU end up generating "backscatter" spam. >> >> Regards >> Sergio Masci --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .