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I am trying to configure a POP3 connection for a catch-all mailbox in such a way, that the mail is delivered to the mail address it was sent to.

I already have an MX record for the kerio mailserver, the mailboxes are working fine.
But as a fallback the customer want's the POP3 catch-all solution.

But the mail gets bounced when using the envelope-to or to header.
As soon as we activate the preferred header, kerio thinks the To field is NULL.
But if we look in the source of the email received by the catch all box, envelope-to and to are correctly filled.

we currently use 8.0.0 build 639 for testing.
Is anybody using POP3 with preffered header in this version?

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Found the following solution:

- create the primary domain
- add aliases to the domain
- create users
- create DNS MX 10 record pointing to the kerio server with your hosting provider

fallback solution when SMTP traffic is not possible
- create a popbox with catch-all enabled at your external domain
- add another DNS MX 20 record pointing to the webserver hosting your (email)domain
- create a delivery rule in kerio, connecting to your catch-all popbox
- select sort by x-envelop-to
- create sorting rules:
1st sorting rules for your external domain aliases
* -> *<_at_>
2nd create one or more sorting rules to deliver specific emails directly to the right users (eg. management, sales, CEO, HRM etc) because of privacy etc.
Last rule to deliver the email to a postmaster/public folder

!! Would be nice feature upgrade for kerio to create this function !!
To automatically check whether there is a match between x-envelope-to and user mailboxes in kerio.
Saves a lot of work.
And in cases where it is not possible to change/add DNS MX records, the construction via Catch-all and POP3 delivery with automatic sorting almost gives the same result!!

[Updated on: Mon, 28 January 2013 19:52]

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