2019/09/04 by Jérôme Gays.
Numericable and Noos MXs records moved to SFR: check your (Power)MTA settings
In 2014, French ISPs Numericable and SFR merged to become the Altice France group. Numericable was itself the result of a merger between NC Numericable and Noos in 2007. Up to now, mailboxes at these ISPs were managed independently using different MXs and anti-spam protection. Noos and Numericable domains on one end and SFR […]
Categories: Authentication, Deliverability, General, Postfix, PowerMTA, Providers
2019/05/16 by Willem Stam.
Brand Indicators for Message Identification (BIMI) ready for take off?
BIMI is the new open standard to visualize your brand in the recipient’s mailbox with an image. Why BIMI? The new standard makes use of DMARC, leading some to call BIMI “DMARC 2.0”. While almost all previous authentication and identification methods work in the background, BIMI is the first one that really tries to visualise […]
Categories: Authentication, DMARC, General
2018/11/27 by Willem Stam.
Proper MIME prevents DKIM failures in Outlook
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. (A generic explanation of what DKIM is and how it works is available on dkim.org.) Analysing SMTP headers The first thing we did was to analyse the […]
Categories: Authentication, General