Postmastery

06/02/2024

After sharing knowledge about Yahoo, Google, Outlook, Orange, SFR and Office365, the Postmastery Team is happy to share its intelligence on the biggest French free Webmail Laposte.net! Find all information about Laposte.net Feedback Loop with Signal Spam, LPN SMTP error codes, how to mitigate them and how to reach out to the Laposte.net Abuse Team.
https://www.postmastery.com/laposte-net-postmaster-smtp-error-codes-lpn/

24/05/2022

EMday (emday.fr) just started! The Postmastery team facilitates one of the sessions on how emails of some of EMday attendees perform against best practices. https://www.postmastery.com/postmastery-email-analytics-console/

10/06/2021

We proudly present our speaker Maarten Oelering at the Festival of Email on Friday, June 11, 4 PM CET. His presentation will give key insights regarding the setup, improvement and management of on-premise email infrastructure. Topics covered are: advantages and challenges, hosting, IPs, infrastructure, MTA landscape, monitoring and deliverability management, and more. For more details, please visit https://festivalofemail.com/

09/06/2021

We proudly present our speaker Maarten Oelering at the Festival of Email on Friday, June 11, 4 PM CET. His presentation will give key insights regarding the setup, improvement and management of on-premise email infrastructure. Topics covered are: advantages and challenges, hosting, IPs, infrastructure, MTA landscape, monitoring and deliverability management, and more. For more details, please visit https://lnkd.in/gMffK5G

20/09/2019

This time not behind the PowerMTA steering wheel but behind a more traditional one... Great day at the IJsselmeer with complete Postmastery crew :)

05/09/2019

Numericable and Noos MXs records moved to SFR: check your(Power)MTA settings: https://www.postmastery.com/numericable-and-noos-mxs-records-moved-to-sfr-check-your-powermta-settings/?fbclid=IwAR1jdnLwofO_m-2vInN85-i29HVFQYuofc91nMp0H4KOxh5LrG5epQmpyQ0

22/08/2019

Get a sneak peek into the future of PowerMTA. Join Postmastery at the PowerMTA Summit 2019.
Register here: https://events.sparkpost.com/pmtasummit-2019

22/08/2019

Postmastery recently released the new version of EmailAudit.com, a free deliverability checking tool. Please let us know your feedback. Our friends at EmailVendorselection even wrote a nice intro article: https://lnkd.in/gDz8K_u

Postmastery released their improved email deliverability checker tooling called EmailAudit earlier this year. Good senders should get their emails delivered. With this free tool, email senders can check if their email is properly set up for successful delivery. Or if there are any technical problems...

01/03/2019

'The making of' and Postmastery's client's shirt 'in action'!

13/12/2018

A List-Unsubscribe header is a global ‘bulk-email’ best practice. This blog post summarises how to set up List-Unsubscribe and gives an interesting example. It also covers Postmastery’s List-Unsubscribe add-on feature for PowerMTA users.

A summary on how to set-up List-Unsubscribe and an interesting use case. For PowerMTA users Postmastery’s List-unsubscribe add-on feature will be discussed.

28/11/2018

At Postmastery, we work for various ESPs and brands to optimise email delivery. Recently, one of our clients faced a mysterious DKIM failure when sending mail to Outlook.com domains.... https://www.postmastery.com/proper-mime-prevents-dkim-failures-in-outlook/

Use proper MIME encoding and always test your output at a header level with various large ISPs like Outlook, Gmail and Yahoo to prevent DKIM failures.

02/11/2018

Do not forget to join next week webinar: The Future of PowerMTA with Postmastery & Port25: Tuesday, 6 November at 4:00 p.m. CET / 10 a.m. EDT. For additional details and registration visit our website at

The Future of PowerMTA with Postmastery & Port25 Join the Postmastery/ Port25 webinar on Tuesday, 6 November at 4:00 p.m. CET / 10 a.m. EDT. In the webinar, three panellists will have an open conversation about the future and PowerMTA’s next steps. They will answer questions from the PowerMTA comm...