Mail module - warning notification

Feature
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1

Hi people, lovers oh Nethserver!

I am using Nethserver 8 with a few server installations. Mostly as “mail” server, also “nextcloud” and “lamp“.

All I can say - I love it - as it is all I need. All in the box! But some minor tweaks were also usefull and that is why I am writing…

Some people have warned me, suggested, that it would be a good point to have a WARNING for incoming mail:

something like red sign - “Be aware - this is external mail!“ I have seen it in the body of messages, as html can be inserted there.

This should be inserted just for external mails, not local sent for local domain → local domain.

I have investigated some points, Altermine and Milter are suggested.

Could it be possible, to integrate somethink like this into Nethserver 8 - Mail module?

Thanks!

2

So all non local inbound email should have a policy based header?

Please note that internally forwarded non-local domain emails with clickable URL’s will still be clickable without a warning.

So the question is, are you trying to hide staff incompetance/mistakes or solve a technical issue?

Don;t get me wrong, I see these ‘warnings’ all over the place, but without policy and training they are worthless, which they are btw legally.

3

Adding such notification breaks the mail signatures, check following thread:

Additionally, to really check if a mail comes from external/internal you’ll need a mail gateway as you can’t rely on sender addresses because of spoofing.