This guide explains why sending an Infomaniak Newsletter may be blocked and how to avoid this in the future.

The reasons for a Newsletter block

• Sending a Newsletter can be blocked:
  • if too many of the recipients' email addresses are invalid.
  • if the SPAM rate is too high.
• As a Mail host and provider of a Newsletter service, Infomaniak must take all necessary measures to prevent any spam abuse. Indeed, if its IP addresses or domains are blacklisted, this can result in the blocking of all emails sent by its other clients, even legitimate ones, which would negatively impact the reputation and quality of service for all of its users.

How to avoid a Newsletter block?

• Use only a contact list that you have built yourself.
• Build your lists through double opt-in forms
• Use a contact list cleaning service regularly, at least once a year with services like neverbounce, bounceless, verifalia, or quickemailverification
• In the body of your emails, always keep your brand/company name clear and visible!
• Never import a contact list from another newsletter host without having cleaned it first!
• Before sending, make sure your campaign only reaches the group of subscribers you intend to.

What to do in case of a Newsletter block?

• After a block, contact support to be able to complete the blocked send.