This guide concerns outgoing spam from Infomaniak infrastructure and helps you identify and resolve the possible causes when an email sent from an address hosted by Infomaniak arrives in the recipient's Spam (junk mail) folder.

Using Email Properly

Infomaniak implements enhanced measures to ensure the security and deliverability of emails. By also following the best practices below, you significantly reduce the risk of your messages being considered unwanted.

1. Use a Valid Email Address

• Verify that your email address and the associated domain are correct and valid.
• Check the security settings of your domain name (SPF, DKIM, DMARC).
• If you change a setting, wait approximately 24 hours before retesting the sending.

2. Avoid Suspicious Content

• Avoid words, phrases, or presentations that are frequently associated with spam (abusive promotions, generic phrases, overly complex layout, etc.).
• Do not include insecure, truncated, or poorly formatted links.
• Personalize your messages (e.g., by mentioning the recipient's name) to enhance their credibility.
• Do not attach suspicious or excessively large files; instead, use a service like SwissTransfer.

3. Test Sending from the Infomaniak Web Mail App

• If you are using a third-party email software/client, try sending the message from the Infomaniak Mail web app (ksuite.infomaniak.com/mail).
• Compare the results to identify whether the problem comes from your email software/client or a configuration setting.

4. Monitor your domain's reputation

• If your email address uses a custom domain (e.g., @your-domain.xyz), a poor domain reputation can affect the deliverability of your messages.
• Analyze and correct the possible causes (old bulk sends, incorrect configuration, reports, etc.).
• The time elapsed since the domain creation date can play a role.

5. Obtain recipient consent

• Only write to recipients who know you or are expecting your message.
• For group or regular sends, use a voluntary subscription (opt-in) system.
• For information or marketing campaigns, prefer the Infomaniak Newsletter solution.

6. Optimize sending frequency and volume

• Avoid sending a large number of identical messages to many recipients simultaneously.
• Respect a reasonable sending frequency to avoid being identified as a suspicious sender.

7. Be added to the Infomaniak whitelist

• If your emails are classified as spam by a recipient also hosted by Infomaniak, they can add your address to their whitelist.
• This action ensures that you receive your messages, but it does not replace the need to investigate the root causes that initially led to the messages being classified as spam.