Tag: MSN/Hotmail

List-Unsub header

Benjamin asked in the comments where in the interface the “unsubscribe” or “block” popup appeared. This is the dialog box Microsoft uses when the add the “unsubscribe here” link at the top of a message. Screenshots taken today from my Hotmail account: At this point we have 3 of the major webmail providers (Yahoo, Microsoft, […]


Oh, Microsoft

Things have been a little unsettled at Microsoft webmail properties over the last few months. A number of ESPs reported significantly increased deferrals from Microsoft properties starting sometime late in November. Others saw reduced open rates across their customer base starting in late October. More recently, people are noticing higher complaint rates as well as an […]


Happy 2018

This is the time of year when everyone starts posting their predictions for the coming year. Despite over a decade of blogging and close to 2500 blog posts, I have’t consistently written prediction articles here. Many years I don’t see big changes on the horizon, so there’s not a lot to comment on. Incremental changes […]

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Microsoft MXs changed over

Today on MailOp it was announced that the migration of Microsoft freemail domains to the office 365 backend. Over the next week the mx* mail servers will stop working. Check your settings, folks, and make sure you’re correctly querying DNS before sending.


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 [] said: 550 5.7.1 Unfortunately, messages from [] weren’t sent. Please contact your […]

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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, then the MX for… 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 […]


Ask Laura: Is the SmartScreen Filter Really Smart?

Dear Laura, Can you help me understand the Microsoft SmartScreen filter? I’m working on a new project and we’re not able to get to the inbox at Microsoft.  Our SNDS/JMRP health is great, not a problem that we can see, but when we contact the support team we’re told we’re being flagged by SmartScreen. It […]

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Getting unblocked at

It’s been a crazy week here at M3AAWG. I have a lot of stuff to blog about, but I think one of the really important things to get out is the new unblock request page at Outlook / Hotmail. Submit your IPs and it will be reviewed. (Apologies for the repeated bad links. I’m […]


Thoughts on Hotmail filtering

One of the new bits of information to come out of the EEC15 deliverability discussions is how Hotmail is looking at engagement differently than other webmail providers. Many webmail providers really do look at overall engagement with a mail when making delivery decisions. And this really impacts new subscribers the most. If there is a mailing […]


Email predictions for 2015

Welcome to a whole new year. It seems the changing of the year brings out people predicting what they think will happen in the coming year. It’s something I’ve indulged in a couple times over my years of blogging, but email is a generally stable technology and it’s kind of boring to predict a new […]

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