Showing posts with the label isps

Cool Tool: Email Provider Status from Groups.io

Groups.io is a provider of email discussion group hosting that has been around a good long while ( launched in 2014 ) and serves up rather a lot of email. That gives them insight into delivery delays and connection problems relating to internet service providers and mailbox providers both big and small -- the places where their users and those users' community members host their own ma…
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Orange.fr launches new postmaster site

French mailbox provider Orange (orange.fr) has launched a new Postmaster Site , where they share email delivery guidelines, notes for large senders, Orange SMTP error codes, Orange's outbound IP addresses, and information on how to contact support for deliverability and em…

Microsoft: Intermittent STOREDRV.Deliver errors on April 9th

Are you tying to send mail to users at Microsoft OLC domains like Outlook.com and are receiving rejections back that look like this: 532 5.3.2 STOREDRV.Deliver; Missing or bad mailbox Database property If so, know that you are not alone. Microsoft seems to be rejecting some per…

Stuck in the middle with you: When shared domains are actively risky

What do you do when you're a newsletter publisher or marketing manager sending emails to your list and you run into deliverability trouble through no fault of your own? How do you even know? It's a tricky and sticky situation and I've seen it happen more than once l…

From Twilio Sendgrid: Ask the Expert: Lili Crowley, Postmaster, Yahoo!

Thanks to Denis O'Sullivan for again sharing great deliverability insight. This time around it's an interview with Yahoo Postmaster Lili Crowley , one of the good people who help to try to keep the barbarians from getting through the gate. It's always good to learn …

Orange France: New Sending IP ranges

The head of Orange 's Anti-Abuse and Internet Security team has been kind enough to let the Mailop mailing list know that in a few weeks, they will be bringing new IP ranges live, to send mail. Mail from Orange FR subscribers will be coming from any of these IP address ran…

Tucows / OpenSRS Infrastructure Changes

Per notification on the Mailop mailing list on November 24, 2021, "Tucows / OpenSRS is executing an upgrade that will result in new SMTP outbound IP addresses being used within the next couple weeks.

OK, you've been unblocked. Now what?

You did it! You got Yahoo or Microsoft to unblock you. Perhaps you even figured out why they "hate" you . Perhaps your friendly neighborhood deliverability consultant just closed the ticket you submitted, letting you know that the ISP has unblocked your sending IP a…

Yahoo is Yahoo again!

Yahoo is Yahoo again! The entity that runs the servers hosting the mailboxes for AOL and Yahoo is now called Yahoo Inc, as of September 1st, 2021. No more Verizon Media. You can find their updated corporate website here , and you can see that the sale of Yahoo by Verizon Media …

Vodafone Germany: Domains and Infrastructure Changes

Per notification on the Mailop mailing list, Vodafone Germany (the German subsidiary of the global telecoms provider Vodafone) is bringing live new email sending infrastructure. Vodafone Germany hosts mail for the following domains: arcor.de, arcormail.de, germanynet.de, gno.…

Is that ISP down?

Almost every mailbox provider is going to have a system issue every once in a while. Some more, some less, but everything catches on fire eventually. Some providers are good enough to maintain system status dashboards and uptime status displays to help you understand if that…

Gmail: Improving spam filtering with TensorFlow

Google just announced today how they've improved spam filtering using TensorFlow . What's TensorFlow, you might ask? "An open-source machine learning (ML) framework developed at Google. These new protections complement existing ML and rules-based protections, and…

Return Path launches Universal FBL

If you manage ISP Feedback Loop (FBL) subscriptions for a set of sending IP addresses, you'll like this. Return Path just launched what they call a "Universal FBL," an ISP Feedback Loop signup and management process that encompasses almost every single ISP FBL k…

Help! I'm blocked at Verizon.net! (Updated for 2024)

Hey! Are you finding your mail rejected when trying to send to verizon.net? Through a complicated series of mergers and acquisitions over the years, AOL and Yahoo and Verizon have all merged into a single MBP (mailbox provider). The surviving entity? Yahoo! Mail. Thus, if you&#…

AOL: Reputation corrected and request denied

Check out the reply I received in response to a recent AOL Whitelist Request submission: Subject:  Reputation corrected and request denied Your Whitelist request, with the confirmation code X, has been denied.   The requested IP address(es) is receiving temporary failures due t…

Verizon Email Transition Update

From Network World, here is an update on the winding down of Verizon's email service, which  I previously reported on here . When is the transition happening? "Once customers are notified, they are presented with a personal take-action date that is 30 days from the ori…

Guest Post: Chris Truitt: A Guide to Microsoft SNDS

Deliverability Expert Chris Truitt was kind enough to reach out to me after he noticed my prior post lamenting the lack of guidance on what you should do with Microsoft SNDS data. Here are his suggestions for what you should be thinking about when looking at Microsoft SNDS da…

What can SNDS tell you?

Microsoft Hotmail / Outlook.com's SNDS ( Sender Network Data Services ) portal is a useful interface where you register to be able to look up reputation data specific to your sending IP addresses. In my " How to troubleshoot Microsoft Outlook.com / Hotmail Delivery Iss…

Microsoft breaks DKIM signature?

It's kind of rare, but not rare enough. Every now and then I hear of a client who is seeing intermittent DKIM failures at Microsoft Outlook.com/Hotmail properties. A Delivery Team Lead for one of the bigger ESPs posted about this on the Mailop list recently, looking for fee…

DeliverNow: New Filters @ Orange, SFR, Laposte

According to France-based Deliverability monitoring company DeliverNow, French ISPs Orange, SFR, and Laposte.net have deployed a new spam filtering mechanism powered by Vade Retro . This new filtering will dynamically block senders who have an elevated spam complaint rate. (I …