Outlook Postmaster(y) page

IMPORTANT UPDATE 02/04/2025: Outlook announced on their Community Blog that they will enforce requirements for High Volume sender starting May 5, 2025. To help the sender community, we are glad to share our experiences collected over the years with some ISPs. This page concerns Outlook.com, whose webmail is one of the most widely used in […]

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Categories: Authentication, Deliverability, ISP

Warming sender reputation fast and getting it right!

Warming IP and domain reputation does not need to take months – there are many things you can do to speed up the process. Even a large enterprise sender can warm a range of IPs and domains in weeks. Proper preparation, planning and tools are essential to warm up your sender reputation. Enterprise senders often […]

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Categories: Case Studies, Deliverability, General

Orange Postmaster(y) page

In order to help the sender community, we are glad to share our experiences collected over the years with some ISPs. This page is about the biggest French ISP: Orange (orange.fr and wanadoo.fr), Orange postmaster. Please find below the table of content of this post: – Market share and history of ISP – Anti-Spam Measures […]

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Categories: ISP

Will we meet you at these events?

This year we will attend the events listed below. Join us online or face-to-face there. We look forward to seeing you for a chat or a drink and to hearing all your news. Let us know if you are planning to go to any of these. EMDAY, 24-25 May in Paris Two days devoted to […]

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Categories: General

HTTP based APIs and webhooks in PowerMTA 5.0

The standard protocol for transferring email is SMTP and the MIME standard is used to encode emails before transfer. As the leading email delivery engine, PowerMTA’s implementation of SMTP is extremely robust and performant. It also supports the latest SMTP extensions for internationalisation, authentication and encryption. But SMTP and MIME do not communicate well with […]

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Categories: General, PowerMTA

PowerMTA & Managed Deliverability

Client case: MailPoet MailPoet was founded in 2011 in France with a simple mission: allow thousands of WordPress website owners to create and send emails from the comfort of their WordPress admin. MailPoet built a simple, intuitive, and rock solid solution to deliver their users’ emails on time, every time. Below you can read more […]

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Categories: Case Studies, Deliverability, General, PowerMTA

PowerMTA Configuration with Version Control | Complete Guide

Postmastery strongly encourages the use of a version control system for PowerMTA configurations. In this blog post, we will define version control, explain why PowerMTA configuration version control is important, and give you some guidelines on how to implement this on your own PowerMTA site. Version control: what, who, when and why?

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Categories: General, PowerMTA

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