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From: Grant Taylor To: gentoo-user@lists.gentoo.org References: <20180119184636.xpccha2xkpe4khaw@matica.foolinux.mooo.com> <20180119194326.3pbu7acg7e5tvmqa@matica.foolinux.mooo.com> <61e0fc02-8eb5-6988-3bc6-fb17f771e463@gmail.com> <01edf856-529a-a981-f1df-60b7ad5dabdc@gmail.com> <20180119222421.7idqkiuzqnt4ymps@matica.foolinux.mooo.com> <8d4032b1-ecf6-059e-ac04-5c052260e06c@spamtrap.tnetconsulting.net> Organization: TNet Consulting Message-ID: Date: Fri, 19 Jan 2018 17:39:20 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.0 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 In-Reply-To: <8d4032b1-ecf6-059e-ac04-5c052260e06c@spamtrap.tnetconsulting.net> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms040204050307010000010100" X-Archives-Salt: c6d9ee62-1fe5-434b-8362-f77e7a0e400b X-Archives-Hash: 720a7e46c35a725f5e726e0a4c7ad1e1 This is a cryptographically signed message in MIME format. --------------ms040204050307010000010100 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 01/19/2018 05:30 PM, Grant Taylor wrote: > I'm trying to juggle the various pieces as I understand them to see if = > everything can work together. I have a fleeting thought that /might/ work. I want to write it down=20 before I loose it. 1) Configure Sendmail's MTA to not have any listening daemon ports. -=20 This means that all interface to the MTA will be via the=20 /path/to/sendmail binary. 2) Configure Sendmail's MSA to listen on TCP port 25. 3) Configure Sendmail's MSA to smart host (without encryption) through=20 your existing SMTP to Exchange gateway. I /think/ this addresses most parts. SMTP from ??? connects to the MSA which connects to the Exchange Gateway = which connects to Exchange via something other than SMTP. - I think=20 that tracks. Email from the local machine uses the /usr/sbin/sendmail interface which = speaks SMTP to the world or a smart host. I think that does work. Granted, there are some IPs and or ports to=20 juggle to make sure that Sendmail's MSA and your SMTP to Exchange=20 gateway don't conflict. But I think that should be possible to handle. I don't know if the other common MTAs can do anything like this or not.=20 I would hope that they can. I will also say that it is possible to get Sendmail to do some really=20 complex things. It may be possible to get a single sendmail daemon to=20 do everything. But I think that is going to be more complicated,=20 possibly needlessly so if the above recommendation works. I need to know more details about the different accounts and how they=20 interact with msmtp (which I have zero experience with) to know if they=20 will play nicely with the above configuration. The only niggling feeling I have is about 127.0.0.1:25. Is anything at=20 all using that? I've run across a lot of programs that assume the local = MTA is listening there. - If something is, then it's likely a matter=20 of juggling IP(s) and port(s) that various things are listening on. --=20 Grant. . . . unix || die --------------ms040204050307010000010100 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 CxcwggUpMIIEEaADAgECAhAIzwdZriPvq7FXSbc0jGReMA0GCSqGSIb3DQEBCwUAMIGXMQsw CQYDVQQGEwJHQjEbMBkGA1UECBMSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYDVQQHEwdTYWxm b3JkMRowGAYDVQQKExFDT01PRE8gQ0EgTGltaXRlZDE9MDsGA1UEAxM0Q09NT0RPIFJTQSBD bGllbnQgQXV0aGVudGljYXRpb24gYW5kIFNlY3VyZSBFbWFpbCBDQTAeFw0xNzExMTcwMDAw MDBaFw0xODExMTcyMzU5NTlaMCsxKTAnBgkqhkiG9w0BCQEWGmd0YXlsb3JAdG5ldGNvbnN1 bHRpbmcubmV0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvhfMhFM6CDAWL4Mg 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