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Tag: Office365

Troubleshooting and codes

Microsoft is still in the process of rolling out new mail servers. One thing that is new about these is some new codes on their error messages. This has led to questions and speculations as to what is going on. host outlook-com.olc.protection.outlook.com [104.47.9.33] said: 550 5.7.1 Unfortunately, messages from [10.10.01.01] weren’t sent. Please contact your […]

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Engagement filters for B2B mail

While I was doing some research for a client today I rediscovered Terry Zink’s blog. Terry is one of the MS email folks and he regularly blogs about the things MS is doing with Outlook.com and Office 365. The post that caught my eye was discussing the Microsoft Spam Fighter program. The short version is […]

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Microsoft changes

There’s been quite a bit of breakage and delivery failure to various Microsoft domains this month. It started with them changing the MX for hotmail.co.uk, then the MX for hotmail.fr… and both these things seem to have broken mail. I also saw a report this morning that some of the new MXs have TLS certificates […]

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Catching up from MAAWG SF

Had a great time a M3AAWG last week. So many familiar faces and a lot of new ones, too. I’ve got a lot of interesting stuff that I can share with readers over the next few days. One of the things I have received permission to share is the new Office 365 IP delisting link. […]

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IPv6 and authentication

I just saw a post over on the mailop mailing list where someone had been bitten by some of the IPv6 email issues I discussed a couple of months ago. They have dual-stack smarthosts – meaning that their smarthosts have both IPv4 and IPv6 addresses, and will choose one or the other to send mail over. […]

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Filtering more than spam

The obvious application of machine learning for email is to send spam to the junk/bulk folder. Most services use some level of machine learning for filters. Places like Gmail have extensive machine learning filters to filter spam and unwanted mail away from their users. Some organizations are taking the filtering process a step further. Almost […]

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April 2015: The Month in Email

We started the month with some conversations about best practices, both generally looking at the sort of best practices people follow (or don’t) as well as some specific practices we wanted to look at in more depth. Three for this month: Be gracious with opt-out requests. Email marketing is hard. Even when it’s successful, response […]

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Office365/EOP IPv6 changes starting today

Terry Zink at Microsoft posted earlier this week that Office365/Exchange Online Protection will have a significant change this week. Office365 uses Exchange Online Protection (EOP) for spam filtering and email protection. One of the requirements to send to EOP over IPv6 is to have the email authenticated with either SPF or DKIM.  If the mail […]

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Office365 checking DMARC on the inbound

According to a recent blog post, Office365 is starting to evaluate incoming messages for DMARC. I talked a little bit about DMARC in April when Yahoo started publishing a p=reject message. DMARC stands for Domain-based Message Authentication, Reporting and Conformance. What DMARC does is allow domain owners to publish policy statements in DNS telling receiver domains […]

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  • OTA joins the ISOC

    The Online Trust Alliance (OTA) announced today they were joining forces with the Internet Society (ISOC). Starting in May, they will operate as an initiative under the ISOC umbrella. “The Internet Society and OTA share the belief that trust is the key issue in defining the future value of the Internet,” said Internet Society President and CEO, Kathryn Brown. “Now is the right time for these two organizations to come together to help build user trust in the Internet. At a time when cyber-attacks and identity theft are on the rise, this partnership will help improve security and data privacy for users,” added Brown.No Comments


  • Friday blogging... or lack of it

    It seems the last few Friday's I've been lax on posting. Some of that is just by Friday I'm frantically trying to complete all my client deliverables before the weekend. The rest of it is by Friday I'm just tired. Today had the added complication of watching the Trumpcare debate and following how (and how soon) it would affect my company if it passed. That's been a bit distracting, along with the other stuff I posted about yesterday. I wish everyone a great weekend.1 Comment


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