iCloud Postmaster(y) page

To help the sender community, we are glad to share our experiences collected over the years with some ISPs. This page is about the ICloud. – Market share and history of MBP – Anti-Spam Measures – Feedback Loop – Technical and SMTP tweaks – Common Error SMTP Messages – Abuse Desk & Tech Support

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Categories: Authentication, Deliverability, ISP

Laposte.net 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 main French Mailbox Provider: Laposte.net. This mailbox provider represents millions of active users and is the French biggest free Webmail. Postmastery integrates data from the aggregated Feedback Loop of […]

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Categories: Authentication, Deliverability, ISP

Gmail Postmaster(y) page

IMPORTANT UPDATE 23/11/2023: Since November 15, Google has changed many of its SMTP answers, this blog post has been updated with these new messages. In case of any need, please reach out to the Postmastery Team. To help the sender community, we are delighted to share our extensive knowledge and experiences gained over the years […]

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Categories: Authentication, ISP

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