Arnaud Abélard

> This should be done on the server. We support Sieve. Sieve can do this +1 This will require some configuration system wide (or mail server wide if using provisionning?)...

On the subject, the search keywords from: and to: will only work if you enter a whole address and will not return any result with you use a firstname, lastname...

I know about the token based solution, i've been following the discussion, but wouldn't that requires to also make change in the way the xmpp server does authentication? Wouldn't it...

well, as soon as nextcloud/server/pull/2044 is merged, ~~we~~ you could retrieve the user credentials from there