Postfix cant send some mails: 550-Reject due to policy restrictions

Discussion in 'Server Operation' started by xavias31, Aug 25, 2016.

  1. xavias31

    xavias31 New Member

    i installed postfix on our new root. We have a new domain too. When i send E-Mails to some Customers who got their mail at or they dont receive the mail.

    I get this error:
    550-Reject due to policy restrictions

    I had this problem with Outlook/Hotmail too, but after i sent a ticket to them they whitelisted our ip and now they can receive our mails (in junk folder.. but its ok for now).

    I setup all records like MX,
    10 ourdomain.tld.
    10 mail.ourdomain.tld.
    "v=spf1 a mx ptr -all"
    v=DKIM1; k=rsa; t=y; s=*; p=OURPUBLICKEY

    I also setup reverse IP at hetzner to our domain (ipv6 too, but i disabled ipv6 on our server for postfix).

    Someone know what the problem is ? I tried almost everything but now im really desperate.

    Kind regards

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