From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 14edab5b for ; Wed, 26 Jun 2019 04:08:11 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 32B159BDCE; Wed, 26 Jun 2019 14:08:09 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id B6A659BD94; Wed, 26 Jun 2019 14:07:39 +1000 (AEST) Authentication-Results: minnie.tuhs.org; dkim=fail reason="signature verification failed" (1024-bit key; secure) header.d=tnetconsulting.net header.i=@tnetconsulting.net header.b="N39ejQkM"; dkim-atps=neutral Received: by minnie.tuhs.org (Postfix, from userid 112) id 387D99BD94; Wed, 26 Jun 2019 14:07:37 +1000 (AEST) Received: from tncsrv06.tnetconsulting.net (tncsrv06.tnetconsulting.net [45.33.28.24]) by minnie.tuhs.org (Postfix) with ESMTPS id 4D0829BD84 for ; Wed, 26 Jun 2019 14:07:36 +1000 (AEST) Received: from Contact-TNet-Consulting-Abuse-for-assistance by tncsrv06.tnetconsulting.net (8.15.2/8.15.2/Debian-3) with ESMTPSA id x5Q47WWj013300 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NO) for ; Tue, 25 Jun 2019 23:07:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=tnetconsulting.net; s=2019; t=1561522055; bh=1XcOl7NS06ROiYH33+z/LL3lQo+k5vPrLSqe7m7/e/M=; h=Subject:To:References:From:Message-ID:Date:User-Agent: MIME-Version:In-Reply-To:Content-Type:Cc:Content-Disposition: Content-Language:Content-Transfer-Encoding:Content-Type:Date:From: In-Reply-To:Message-ID:MIME-Version:References:Reply-To: Resent-Date:Resent-From:Resent-To:Resent-Cc:Sender:Subject:To: User-Agent; b=N39ejQkM1s81ISODRGS+5xkJyhgIJhJOOble4058PHz6CeqWW6mB0dONFlWcwQ2DX jr6PPsw9DUf/YUI/cBaueS78A09MfDVRsCkBNef2u2qP8OzQox6D6N51NcinPkPk9C o31ylU6jDf3Y0o9Hecn/vhGd7z3zMceAORPFMA6g= To: tuhs@minnie.tuhs.org References: <20190626025023.GA17457@minnie.tuhs.org> Organization: TNet Consulting Message-ID: <4fa4c2ef-93ee-a810-227e-a76d4dd9af9d@spamtrap.tnetconsulting.net> Date: Tue, 25 Jun 2019 22:07:25 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <20190626025023.GA17457@minnie.tuhs.org> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms000305040100090908000007" Subject: Re: [TUHS] Testing Mail Connectivity X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Grant Taylor via TUHS Reply-To: Grant Taylor Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" This is a cryptographically signed message in MIME format. --------------ms000305040100090908000007 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 6/25/19 8:50 PM, Warren Toomey wrote: >> You need to grok Sendmail's log format (and SMTP in general), but it m= eans=20 >> that Minnie connected to my server, waited the requisite time for the = greeting=20 >> banner, and then shat herself when she saw my ginormous banner and dro= pped the=20 >> connection without so much as a good-bye... >=20 > i.e.a multiline response to the HELO/EHLO which meets the RFC specs. >=20 >> That simple measure, along with the greeting pause and some simple RFC= DNS=20 >> checks, block a lot of the crap. The greet pause seems longer than I'd choose, but I think it's less than = 60 seconds. Any reasonable mail server should handle that. So that=20 shouldn't be an issue. > I've just subscribed to the Postfix mailing list, and I'll ask on there= =20 > if there is a configuration change I can make to allow my Postfix clien= t=20 > to deal properly with Dave's multiline HELO/EHLO response. And why it c= an't=20 > at present. I'd be surprised if Minnie had a problem with the multi-line greeting. I think Postfix (if that's what Minnie is running) has been dealing with = multi-line greetings for a while. There's also the fact that=E2=80=94I=20 suspect=E2=80=94Minnie has been successfully delivering THUS to Dave's se= rver=20 for a while. So unless Dave's multi-line greeting is new.... > But if someone here already knows, could they let me know?! Do you have errors in your log? Dave, Warren, feel free to reply to me (both of us) directly if you want = to discuss this further off list. --=20 Grant. . . . unix || die --------------ms000305040100090908000007 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgEFADCABgkqhkiG9w0BBwEAAKCC Cy4wggVAMIIEKKADAgECAhEA01fiRe1k2R6LEQCcImIMYTANBgkqhkiG9w0BAQsFADCBlzEL MAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2Fs Zm9yZDEaMBgGA1UEChMRQ09NT0RPIENBIExpbWl0ZWQxPTA7BgNVBAMTNENPTU9ETyBSU0Eg Q2xpZW50IEF1dGhlbnRpY2F0aW9uIGFuZCBTZWN1cmUgRW1haWwgQ0EwHhcNMTgxMTE4MDAw MDAwWhcNMTkxMTE4MjM1OTU5WjArMSkwJwYJKoZIhvcNAQkBFhpndGF5bG9yQHRuZXRjb25z dWx0aW5nLm5ldDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANgOhvncDgc4KAlD +pyhFpw6wCfeERlSOAXowjdTjlOR2zcIgzL0TM9A+hkSv2wsVh6fn6VvHGxKrLemReiGd7fQ 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