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jelockwood

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Kerio Connect supports SPF and DKIM and I have both setup and verified.

However there is another standard called DMARC which uses both SPF and DKIM to perform a further layer of checking and it seems Kerio Connect still does not support DMARC.

Note: As examples PayPal, Yahoo Mail and Google Gmail all support DMARC.

See - https://dmarc.org/overview/

There have been some previous threads on the topic of DMARC but these were quite old and some even pre-dated Kerio Connect supporting DKIM. I am therefore posting this new fresh thread to revive this topic to see if others agree it would be useful to add to Kerio Connect.
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freakinvibe

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You don't need any feature in KC to support DMARC for your outgoing email. You just add the DNS record according to instructions.

KC does not support DKIM checks and DMARC checks for incoming email.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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jelockwood

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Yes it is indeed possible to just add another DNS record but this is not sufficient for full DMARC support and makes just adding the DNS record a waste of time.

Kerio needs to check incoming emails just like it already does for SPF.
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freakinvibe

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It is not a waste of time to add the DNS records. By specifying the DMARC records in DNS, you tell any mail servers (Gmail, Yahoo etc.) what to do if someone spoofs addresses from your domain. This can reduce the backscatter you get and also reduces angry replies from the people that think they got spam from your domain.

In addition, DMARC spcifies the email address where you will get reports on how many times your domain has been spoofed etc. So you get some insight if any email addresses from your domain have been abused.

Doing a DMARC check in KC is quite complex to implement as you have to analyze the incoming mails and then send DMARC reports to the senders. Also, implementing DMARC support only makes sense if you support DKIM for incoming mails, which KC does not do.

[Updated on: Thu, 21 September 2017 15:15]


Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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