[gentoo-user] dkim and dmark, how to set up

[John Covici]

Hi. I have my mail server and I want to finally set up dkim and dmark
as appropriate, but I am not sure which packages to use and where
there is some documentation exists, so I can figure out hhow to do
it. My mta is sendmail.

Thanks in advance for any suggestions.

[Michael]

Post by John Covici
Hi. I have my mail server and I want to finally set up dkim and dmark
as appropriate, but I am not sure which packages to use and where
there is some documentation exists, so I can figure out hhow to do
it. My mta is sendmail.
Thanks in advance for any suggestions.

You'll need mail-filter/opendkim if you're sending mail directly to recipients
from your mailserver, but if your sendmail is configured to relay messages via
an ISP's mail server then the ISP will be using such a package instead.
You'll also have to add your dkim public key to your DNS record, while the
private key will stay on your mailserver. Again, if you're relaying via an
ISP, they will store the private key on their server.

Some ideas explained here, but more detailed instructions may be available in
the interwebs:

https://wiki.gentoo.org/wiki/OpenDKIM

https://www.vttoth.com/CMS/technical-notes/356-setting-up-dkim-with-sendmail

https://wiki.gentoo.org/wiki/Postfix/DMARC

[John Covici]

On Mon, 25 Sep 2023 09:09:34 -0400,

[1 <text/plain; UTF-8 (7bit)>]

Post by John Covici
Hi. I have my mail server and I want to finally set up dkim and dmark
as appropriate, but I am not sure which packages to use and where
there is some documentation exists, so I can figure out hhow to do
it. My mta is sendmail.
Thanks in advance for any suggestions.

You'll need mail-filter/opendkim if you're sending mail directly to recipients
from your mailserver, but if your sendmail is configured to relay messages via
an ISP's mail server then the ISP will be using such a package instead.
You'll also have to add your dkim public key to your DNS record, while the
private key will stay on your mailserver. Again, if you're relaying via an
ISP, they will store the private key on their server.
Some ideas explained here, but more detailed instructions may be available in
https://wiki.gentoo.org/wiki/OpenDKIM
https://www.vttoth.com/CMS/technical-notes/356-setting-up-dkim-with-sendmail
https://wiki.gentoo.org/wiki/Postfix/DMARC

OK, thanks, I will check those out.