On Thu, Sep 25, 2008, Kai Schaetzl wrote: >Ralph Angenendt wrote on Wed, 24 Sep 2008 20:23:50 +0200: > >> That's supposed to help with what regarding his problem? > >Hotmail seems to delete all mail from domains without SPF if it's not >coming from the MX. Yahoo might be doing the same. I don't think this is the case as we host several Mailman mailing lists with hotmail and yahoo subscribers, don't have SPF, and would *NEVER* send mail from an MX IP (they're for receiving mail, not sending it). Where the same machine is receiving messages as an MX, we configure postfix to listen on the MX IP address and send on a different IP. We also have postfix configured to reject e-mail from servers that announce themselves as one of our MX servers in HELO/EHLO as that is guaranteed to be a spammer. Checking one of these lists, I see quite a few hotmail and yahoo addresses, all of which are getting mail from our server on a regular basis. Many of the large ISPs (e.g. AOL, Road Runner, etc.) have feedback loops where one can sign up, providing an e-mail address to address their customer's complaints, and a list of e-mail servers from which your domain's mail originates. The ISP will send notifications when their customer hits the ``this is spam'' button. In the case of AOL, this notification includes the message with the recipient's address redactied, and they expect you to cease sending messages to that address. This requires that one use VERP so that each outgoing message has the recipient address somewhat munged in the headers so it's possible to identify the correct address to remove. We are on the AOL feedback, but not on hotmail or yahoo so they're not accepting mail from our servers based on signing up for the feedback. Bill -- INTERNET: bill at celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 Microsoft is to computers what Phillip Morris is to lungs.