Laposte.net Postmaster(y) page

Market share and history of MBP

Laposte.net is the Mailbox Provider which was created in August 2000 by La Poste, the historic operator of mail and parcel delivery in France. Originally, the @laposte.net email addresses were intended to offer a free email address to all French people without them needing to have an Internet subscription.

With several million active accounts, Laposte.net is the first free French Webmail.

Anti-Spam Measures

To protect its messaging infrastructure, Laposte.net relies on multiple filtering solutions, such as Vade (ex-Vade Secure), to optimize filtering of Inbound messages and fight against fraudsters.

Feedback Loop

Laposte.net has partnered with Signal Spam and Validity to provide a Feedback Loop in ARF format, as well as an aggregated Feedback Loop, accessible only to both Signal Spam members and Validity Universal Feedback Loop free subscribers.

How does the Laposte.net aggregated Complaint Feedback Loop work and how can we access it?
Laposte.net's aggregated Complaint Feedback Loop is a file in CSV format that contains the volume of complaints by IP and by day. This aggregated Complaint Feedback Loop is available to Signal Spam members and Validity Universal Feedback Loop free subscribers.

How does the Laposte.net Complaint Feedback Loop ARF work and how can I access it?
The ARF Complaint Feedback Loop consists of unit complaint reports in ARF format, sent to a dedicated email address. This ARF Complaint Feedback Loop is accessible to Signal Spam members, and also via the Validity Feedback Loop (1.500$ a year).

Common Error SMTP Messages

Here are some examples of error messages indicating a deliverability issue at Laposte.net:

450 4.7.1 <XXX.XXXXXXXX.XXXX[WWW.XXX.YYY.ZZZ]>: Client host rejected: Service refuse. Veuillez essayer plus tard. service refused, please try later. LPN027_503

450 4.1.8 <xxx@xxxxxxxx>: Emetteur invalide. Invalid Sender. LPN007_405

450 4.2.1 <xxxx@laposte.net>: Recipient address rejected: this mailbox is inactive and has been disabled

450 4.7.0 Service refuse. Veuillez essayer plus tard. service refused, please try later. LPN007_510

550 5.1.1 <xxxx@laposte.net>: Adresse destinataire invalide. Invalid recipient. LPN007_416

552 5.2.2 <xxxx@laposte.net>: Over quota

550 5.7.1 Email rejected per DMARC policy for xxxxxxxxxx xxxxxxxxxx: Emetteur refuse conformement a la politique DMARC. Email rejected per DMARC policy. LPN007_517

Each SMTP message ends with a Laposte.net Error Code, whose syntax is LPNXXX_XXX. Each Laposte.net Error Code has very precise signification.
Here is a (non-exhaustive) list of existing Error Codes:
LPN027_503
LPN007_405
LPN007_416
LPN007_510
LPN007_517

As an example, the Error Code LPN007_405 means that the Sending domain has a configuration issue (the sender can’t receive any message) and messages will be temporarily rejected. To fix this issue, you must ensure that all sender addresses accept incoming messages.