From owner-freebsd-questions@freebsd.org Sun Feb 28 19:23:56 2021 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 89FBB53EA2E for ; Sun, 28 Feb 2021 19:23:56 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: from kicp.uchicago.edu (kicp.uchicago.edu [128.135.20.70]) by mx1.freebsd.org (Postfix) with ESMTP id 4DpYGg5x6yz4lg8 for ; Sun, 28 Feb 2021 19:23:55 +0000 (UTC) (envelope-from galtsev@kicp.uchicago.edu) Received: from [IPv6:2607:fb90:17c7:3d97:5001:80ab:de41:f0c6] (unknown [172.58.139.219]) (Authenticated sender: galtsev) by kicp.uchicago.edu (Postfix) with ESMTPSA id 291374E68E; Sun, 28 Feb 2021 13:23:55 -0600 (CST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.120.23.2.4\)) Subject: Re: Somewhat OT: Mail Relay Services From: Valeri Galtsev In-Reply-To: Date: Sun, 28 Feb 2021 13:23:53 -0600 Cc: freebsd-questions@freebsd.org Content-Transfer-Encoding: quoted-printable Message-Id: <808052CB-FE91-4B5C-81ED-B74E5D0CEBB7@kicp.uchicago.edu> References: <877d08ef-d533-69f6-4c44-f2cbbe39ba31@tundraware.com> To: "Russell L. Carter" X-Mailer: Apple Mail (2.3608.120.23.2.4) X-Rspamd-Queue-Id: 4DpYGg5x6yz4lg8 X-Spamd-Bar: ++++++++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=uchicago.edu (policy=none); spf=none (mx1.freebsd.org: domain of galtsev@kicp.uchicago.edu has no SPF policy when checking 128.135.20.70) smtp.mailfrom=galtsev@kicp.uchicago.edu X-Spamd-Result: default: False [8.51 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; MV_CASE(0.50)[]; RCPT_COUNT_TWO(0.00)[2]; RCVD_NO_TLS_LAST(0.10)[]; RECEIVED_SPAMHAUS_PBL(0.00)[172.58.139.219:received]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[128.135.20.70:from]; FROM_EQ_ENVFROM(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:160, ipnet:128.135.0.0/16, country:US]; ARC_NA(0.00)[]; RECEIVED_SPAMHAUS_XBL(5.00)[172.58.139.219:received]; FROM_HAS_DN(0.00)[]; NEURAL_SPAM_SHORT(0.97)[0.967]; MIME_GOOD(-0.10)[text/plain]; R_DKIM_NA(0.00)[]; NEURAL_SPAM_MEDIUM(0.94)[0.942]; SPAMHAUS_ZRD(0.00)[128.135.20.70:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(1.00)[1.000]; R_SPF_NA(0.00)[no SPF record]; RCVD_COUNT_TWO(0.00)[2]; GREYLIST(0.00)[pass,meta]; MAILMAN_DEST(0.00)[freebsd-questions]; DMARC_POLICY_SOFTFAIL(0.10)[uchicago.edu : No valid SPF, No valid DKIM,none] X-Spam: Yes X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 28 Feb 2021 19:23:56 -0000 > On Feb 28, 2021, at 1:17 PM, Russell L. Carter = wrote: >=20 > On 2/28/21 11:01 AM, Tim Daneliuk wrote: >> For many years, I've run a mail system built on FreeBSD for my own = small business. >> It's been as flawless as any mail server ever can be, requiring only = periodic >> maintenance and updates. >> The primary server runs in a 3rd party cloud environment. We are = starting to >> see parts of their network blacklisted by the various UCE blackholing = services. >> Unfortunately, they don't just blackhole a single IP, but an entire = subnet at >> a time, which catches us in the mix. >> The big mail hubs like outlook.com no longer have a mechanism for = removing the block >> for a single ip and kick you back to your ISP or hosting provider for = resolution. >> So ... we are contemplating using a smart host to do all our outbound = email for us >> via relays from our own mail servers. Presumably, such a smart host = would be better >> equipped to deal with bad blacklisting and delivery issues. >> So ... does anyone have experience or recommendations as to who would = be a good >> provider for a low volume, small business mail relay? >=20 > I'm all ears and appreciative of any pointers on this topic as well. > I have been running my own mail servers for two domains for > 20 = years. > The volume is so low and I try to stay "mainstream" in configuration > so I've never been blacklisted (that I know about, I watch). However, > my current last mile ISP is centurylink, from whom I lease 5 static > ips. And they just up and deleted my ptr records for over a month, > and didn't fix it, even after hours on chat, until I shamed them with > an analysis on dslreports, showing how their tech support was flat > out stupid or lying. It happens, but it made terrified of being > reliant on them. So I've decided to put my dovecot+rspamd+postfix > system up on some popular VPS. I am leaning toward vultr, haven't > had any problems with them for years, but I've never needed to > ask them to open port 25, and they require you to ask. >=20 > But I hadn't thought that my co-tenants might cause me a problem with > blacklisted subnets! >=20 > Anybody know of a successful strategy here? Maintaining your own > servers can occasionally be a pain, but I really like managing my > own servers exactly how I want them. And in addition, as someone mentioned good decade ago, it will have to = be subpoena served to you to look into your emails, whereas with email = provider, subpoena will be served to your provider. So, with your own = server you at least will know about this happening. But I do not have my own server (not counting ones I maintain for the = Department at my job place). Valeri > Thanks, > Russell >=20 >=20 >=20 >> _______________________________________________ >> freebsd-questions@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-questions >> To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org" >=20 > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org"