Question: Redirect all Mail to external Mailserver

pjirlip

Hello, i need some advice to solve a little problem and hope someone can help :-)

I have the following problem:

My Mailcow Server should relay all incoming Mail for *.example.de to *.example.com.

For Example:

Domain 1: “example.de”:

MX Points to my Mailcow Server
Over 100 Mailboxes: a@example.de, b@example.de….
Will not be used for Sending

Domain 2: “example.com”

MX Point to external Mailserver. (Office365)
Same Mailboxes: a@example.com, b@example.com….
Will be used for Sending (Only *@example.com)

Now all incoming Mails for example.de should be accepted and relayed to example.com:
a@example.de —> a@example.com
b@example.de —> b@example.com
c@example.de —> c@example.com
…..

My Restrictions & Options:

“example.com” can’t be added to mailcow. And “example.de” can’t be used on the external server.
I can change DNS Records for both Domains.

Is there an “easy” way to archive this forwarding rule?
One possibility would be to create each mailbox for example.de and create a forwarding rule for each mailbox in SOGO individual, but that would be a lot work and isn’t really nice to manage.

Is there a better way to do this? Maybe with Filters?

Appreciate all suggestions and help,

thanks a lot :-)

Cheers PJ

diekuh

Hi, hm, I would either create a sieve filter script to change the domain and forward or add bcc maps via API.