I am trying to setup our website portal to send registration confirmation emails to customers who sign up (its a simple message containing a link that confirms the email of the user).
Everything is nice and working great, @gmail.com users get the emails okey; however, for @yahoo.com users the email goes directly to Spam folder.
I need to add that I have spend 4 days reading every single forum posting on the subject and have implemented every hint and suggestion possible (note: I am not new to system administration, so I can assure you the time spent was digging rather than learning).
- The sending IP is 220.127.116.11
- There is a proper DNS and rDNS/PTR setup
- The IP is not listed in any of the 100+ black lists I have checked online
- The domain has proper MX entries setup (note: the incoming mail servers run on different IP ... can this be a problem? In theory it shouldn't)
- The postmaster and abuse addresses are setup.
- DomainKey is implemented and verified working
- DKIM is implemented and verified working
- SPF is implemented and verified working
- We have signed up for Yahoo and Hotmail Loopback Feed programs
- Here is the site that users Opt-in: www.teltub.com
- I have filled the bulk sender form for Yahoo (it fixed the issue for 3-4 days, but it came back - more on it later)
- Since we are in a test phase, it is extremely unlikely that any of the users actually mark an email as spam (they are mostly friends) and the nature of the emails are not marketing/ads
- Checked SMTP replies from Yahoo, first few days, it included some temporary deferrals but after I filled the forms and signed up with them, it went away.
- Tested a few automatic checkers including allaboutspam.com, all seem good/green: http://www.allaboutspam.com/email-server-test-report/?key=F53F072FADAFE74C8960182016769C56
Three questions I have are:
- Any idea what am I missing?
Someone from Yahoo replied to me that:
Emails from the mail server(s) you are using have recently become de-prioritized due to potential issues with its mailings.
These de-prioritizations were temporary but may be re-triggered if the sending IP profile continues to be poor. Typically, de-prioritizations are triggered by bad individual sender or MAIL FROM profiles.
After asking for more details, they said they can not provide any further information!!
- Yahoo doesn't show the secure key in front of the email ... Even if it is assumed spam, shouldn't it display the source authenticity? In another account that a message from this address is marked as "not Spam", it shows the key okey ...
Here is the delivery log from postfix:
Oct 18 00:59:25 mgmt postfix/smtp: 063E0B988A6: to=<email@example.com>, relay=b.mx.mail.yahoo.com[18.104.22.168]:25, delay=1.6, delays=0.11/0.01/0.61/0.92, dsn=2.0.0, status=sent (250 ok dirdel)
Here is the message header from Yahoo:
From TELTUB Mon Oct 18 04:59:23 2010 X-Apparently-To: firstname.lastname@example.org via 22.214.171.124; Sun, 17 Oct 2010 21:59:25 -0700 Return-Path: <email@example.com> X-YahooFilteredBulk: 126.96.36.199 Received-SPF: pass (mta1015.mail.sk1.yahoo.com: domain of firstname.lastname@example.org designates 188.8.131.52 as permitted sender) X-YMailISG: HGiMWDwcZAr2nMseAcs8EMjEoTTXRB5jVgymRipvWi77dSrO PuvRZPjN1WbGfxHFAyLo99VgChGrTm8Ve_nCA4PLyzhfFKfcsQ8v9FlY3uHJ wt3y34DU2ZChx3ud4Scg1ReSSA8b3d3FY5YmWhQDeeckNZUbGYET0MVbjddu UX9Z6q3fsIfhsMhedk.6ZT3vsJHs8YiWGcAAiKgipdUnPYhQ36axREymHV8L EupzrPp6JE7PM4Ah12Cj8vw8sozDSUiShQM00sD0IC6HUqh4jDRpoISyur.G TbHTaa6rZKcNTtaKfE.BRZCJIBQA3oKvFtPt9QZFcDU98adBzlxK8oZxiOuQ txWdBWL4zveDo8yqH84sRB2jBLfR8Hig4mZ5bZrUMHnq9P.fNB.6z8XEZoMi UBO8eJsYf7Sxug9FtJr9.7.DIRcXshikZker0F0ygc1.ghJwEWLATbGA8UZg l2ekjauSWgt1XJQjr9JOpRWwgBTH4N6lXZLE5BQ8q38m6ZspaAZ3glRNSZLU YpnRNwRHHy8HLxryXONeR_Q5NcZivZZbof3r2SKvJjZ_DZF9wiuEnlSWng15 QUd5BAbnA0fSxlaAjS7ayr9HLq0khsSVdlSYeGQpU.3LU6iZt17x3hjZoCXJ kB2YBa9ZHH3LkJIezOnNooc9LiYzwnsm1_FaVmvGk1XZzDEsJaadXxtf39o_ wo2RQVHNaGbt9huEEy4fAiFx6_ZX3pNhepJLnJf2BgNLCi0ix0bw30EPxPPy 5IaL0vnBeF4S3ReZa2z5cex3apsUULu3vl2zG_HVtsCuvE8- X-Originating-IP: [184.108.40.206] Authentication-Results: mta1015.mail.sk1.yahoo.com from=teltub.com; domainkeys=pass (ok); from=teltub.com; dkim=pass (ok) Received: from 127.0.0.1 (HELO mgmt1.prod.teltub.com) (220.127.116.11) by mta1015.mail.sk1.yahoo.com with SMTP; Sun, 17 Oct 2010 21:59:25 -0700 Received: from www1.prod.teltub.com (localhost.localdomain [127.0.0.1]) by www1.prod.teltub.com (Postfix) with ESMTP id DF46118E81BB for <email@example.com>; Mon, 18 Oct 2010 00:59:23 -0400 (EDT) X-DomainKeys: Sendmail DomainKeys Filter v1.0.2 mgmt1.prod.teltub.com 063E0B988A6 DomainKey-Signature: a=rsa-sha1; s=teltubdk; d=teltub.com; c=simple; q=dns; b=PAHMrH/tt9jRbjOcmeaO6IgbiK+MUfgwP9NZtIMKYNva/ISbDkjUWhHlnbEP1Icji axsb+4Q2QrO8zIsT9tWZw== X-DKIM: Sendmail DKIM Filter v2.8.3 mgmt1.prod.teltub.com 063E0B988A6 DKIM-Signature: v=1; a=rsa-sha1; c=simple/simple; d=teltub.com; s=teltubdkim; t=1287377964; bh=xiqqKdrY0J4R8qUgsW9WMXUKnak=; h=Content-Type:MIME-Version:Content-Transfer-Encoding:From:To: Subject:Message-Id:Date; b=q7FEBCnitX/Ohw0RXnjaEZPkXi+hOJHof+hbGarbyC0zWqTpXiknI2bC6k7+QigEH ZL4JjzA8WK1MZqSaE6oOjTc3yxy+Dj7niAiB4t5cI8GPvvtegLSO6d2yVTmGa5wDFV 5f4i5OpHnccPRHkEQ3ShKMzkjKMgVPkdaObAvMFA= Content-Type: text/html; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: "TELTUB" <firstname.lastname@example.org> To: email@example.com Subject: This is just a test Message-Id: <20101018045923.DF46118E81BB@www1.prod.teltub.com> Date: Mon, 18 Oct 2010 00:59:23 -0400 (EDT) Content-Length: 111