Email Caution Text

Hi everyone.

Apologies if this has already been addressed - please point me in the right direction.

I would like to be able to add a text like this:

External Email: Use caution when opening attachments of clicking links

To the top of the body of incoming emails, and:

[External] before the subject of all incoming emails that come from a domain other than the receiving domain.

It is easy to achieve this with Microsoft 365, but I have no idea if this is a possibility with MailCow/SOGo.

Any assistance in achieving the above will be appreciated.

Many thanks.

Thank you for replying. I have tried adding it to Mailcow, but when click on Validate, it says there is an “Unknown command set…” on line 13…

Ok, just to update, I have managed to get the Subject part of it to work by separating the first bit of the script from:

To:

Hello
Are you able to write the full steps on how to do this please?

Thank you!

same question here