Stricter rules for accepting mail with sender

Mail from senders with the domain is rejected with the following error message:
Forged sender domain from this server

This means that this mail was not delivered via the official Bluewin servers. Bluewin determines by an SPF entry from which servers legitimate mails with sender should come. Cleanmail has so far accepted mail with sender from any server, but now implements the Bluewin specification. With this measure sender falsification and phishing attempts are prevented.

The recipient can not circumvent this rejection by creating an entry in the white list. Instead, the sender must use the correct outgoing mail servers operated by Bluewin. You will find the necessary information in the Swisscom Help Center. If you have any questions about the configuration, please contact Swisscom support or your local PC supporter.

Outlook Express End-Of-Life

Mail is rejected with error message:

Cleanmail no longer accepts messages created by Microsoft Outlook Express. Microsoft ended support in 2009 and replaced it by Windows Mail

This software has not received any security updates for more than 9 years, its use is strongly discouraged.

Nowadays Outlook Express, resp. headers which claim creation by Outlook Express, are almost exclusively used by spammers.

Missing mail

If missing mails are not to be found in your local spam folder or in the Cleanmail Quarantine, please contact our support dept by mail (

To track missing emails or delivery issues Cleanmail requires:

  • Sender mail log snippet showing failed transactions, connections, DNS and Internet routing issues, which ever may apply.
  • Failed sender error message / bounced email.
  • Sender, Recipient and Date of missing message.