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I have created an email server that is capable of handling mail for multiple websites. e.g. [email protected], [email protected] etc. The emails are sending and receiving fine, but the spam score is terrible.

All of the websites hosted have MX records pointing to mail1.mysite.com. I have DKIM setup for mysite.com and spf setup too. Emails sent from mysite.com get a perfect spam free score, but those sent from other domains get sent straight to spam.

Is there a way for me to apply DKIM, reverse dns and SPF to domains that are using my mail1.mysite.com without having to loginto their DNS records and modify them?

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    So you want to use three DNS-based techniques without using DNS?
    – mschuett
    Nov 24, 2015 at 14:18
  • when google hosts domain specific email how do they do it? they dont go around asking for godaddy passwords
    – Dan Hastings
    Nov 24, 2015 at 14:19
  • Google actually has the same "problem". So they tell customers to add those DNS records themselves: SPF and DKIM.
    – mschuett
    Nov 24, 2015 at 14:25
  • damn it. this is going to be difficult to explain to people who dont even know who they registered their domain with. can anything be done for reverse dns?
    – Dan Hastings
    Nov 24, 2015 at 14:52
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    Reverse DNS for the mailserver's IP should be mail1.mysite.com. That is all you can do.
    – mschuett
    Nov 24, 2015 at 15:00

1 Answer 1

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No. The DKIM and SPF records must be added to the domain's DNS records by the domain owner or their authorized agent using the domain's authoritative name server.

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