Dynamic SMTP Banner

Discussion in 'Installation/Configuration' started by Hirbod, Dec 2, 2015.

  1. Hirbod

    Hirbod New Member


    a customer of mine is using "Avira Managed E-Mail". We're using the mx-records for Avira. Everything works fine so far, but web.de and GMX answer with

    Nemesis ESMTP Service not avail able 554-No SMTP service 554-Bad DNS PTR resource record. 554 For explanation visit http://postmaster.web.de/error-messages?ip)

    After talking to Avira, they told me that the Reverse-DNS have to match "customerdomain.com", not "myserverprovider.com". To fix this, I bought another IP @ Hetzner and included everything - it works fine. But I get "Reverse DNS does not match SMTP Banner".

    Is it possible to answer with a IP-Based $myhostname?
  2. Jesse Norell

    Jesse Norell Well-Known Member Staff Member Howtoforge Staff

    You can create a smtp transport in /etc/postfix/master.cf which is bound to just the new ip address and specify -o myhostname=whatever

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