PowerMTA Configuration, Optimization & Troubleshooting

AOL and Yahoo merge could impact your email delivery and MTA

A few weeks ago, AOL reported that AOL and Yahoo will come together under the OATH umbrella and merge with the Yahoo email infrastructure to serve both brands. This happened on 20 February 2018, and now all the AOL recipient domains’ MX, including the following, will point to mx-aol.mail.gm0.yahoodns.net: – aol.com – verizon.net – aol.co.uk […]

Read the complete article

Categories: Authentication, Deliverability, General, PowerMTA, Providers

Case study – Why typo domains can cause severe email delivery issues

In our daily email delivery monitoring activities, we recently saw the damage that typo domains can do. In this case study, simple typos in domains caused severe email delivery issues. We will recap what happened and how we solved the issue. Hopefully, other senders can avoid this kind of situation in the future. Postmastery, we […]

Read the complete article

Categories: Authentication, Case Studies, Deliverability, General, PowerMTA

Five new delivery controls in PowerMTA 4.5

PowerMTA (PMTA 4.5) always had a strong focus on ‘doing one thing, and doing it right’. That one thing is email delivery. This sounds like a simple task, but it is hard to do at scale, both in terms of volume as well as in terms of the differences in the behaviour of receiving systems. […]

Read the complete article

Categories: Authentication, General, PowerMTA

Turnkey email solution based on Interspire and PowerMTA

If you are considering an ‘on-premise’ email marketing solution, there are many options to choose from. One option is to choose a software vendor that provides the necessary components. The advantage of doing this is that the campaign front-end, MTA and bounce/complaint management, is included in an integrated solution. But these solutions are very expensive, […]

Read the complete article

Categories: General, PowerMTA, Solutions

How Jobtome replaced 30 Postfix servers with one PowerMTA

Jobtome helps job seekers access millions of jobs gathered from a hundred thousand recruitment agencyies and employer sites. Jobtome helps companies reach millions of job seekers via pay-per-click based job advertising services. The Challenge: Managing 30 Postfix installations Email is a key business driver within the Jobtome daily operation. The majority of customer interactions are […]

Read the complete article

Categories: Authentication, Case Studies, General, Postfix, PowerMTA

Gmail’s wide deployment of TLS

When talking about authentication and encryption technologies —such are SPF, DKIM, DMARC—, Gmail has always been at the cutting edge of the topic. After having implemented Google Postmaster (read our related article), it is therefore possible to monitor the percentage of Google’s outgoing and incoming emails TLS encrypted or not. Announced by Google last week, […]

Read the complete article

Categories: Authentication, General, PowerMTA

Message Systems acquires Port25 (PowerMTA)

Two weeks ago, Message Systems announced the acquisition of Port25, marker of the popular PowerMTA. Message Systems is the world’s main supplier of emailing infrastructures, running circa 20% of the world’s legitimate email. This purchase means an important milestone in the email sending arena. Both enterprises offer on-premise solutions to the world’s most massive emailing […]

Read the complete article

Categories: General, PowerMTA

There are many more interesting blogs by category for you to read.